1. Basic knowledge
water supply project
1. Classification of outdoor water supply systems:
(1) Water supply system with ground water as the water source;
(2) Water supply system with ground water as the water source.
2. Outdoor water supply system form: DC water supply system, circulating water supply system, and sequential water supply system.
3. Classification of indoor water supply systems: life, production, fire protection.
4. Indoor water supply system composition: introduction pipes, water meters, pipelines, water supply accessories, boosting and storage equipment, and indoor fire protection equipment.
5. Pressure composition of indoor water supply system: H=H1+H2+H3+H4.
where: H1 = the elevation difference between the introduction pipe and the most unfavorable loop and the most unfavorable point; H2 = along the route and local resistance; H3 = water meter resistance; H4 = outlet head (the heating circulation pump only overcomes along the route and local resistance, with a head of 35-40m).
6. Indoor water supply method:
(1) Simple water supply method;
(2) Set water supply method for water tanks;
(3) Set water pump water supply method;
(4) Set water supply method for water pools, water pumps, and water tanks;
(5) Partition water supply method;
(6) Air pressure water supply method;
(7) frequency conversion water supply method.
7. Indoor water supply system pipeline diagram: upper part, middle part, lower part.
8. Indoor water supply laying method: open installation and installation (note: galvanized steel pipes buried in the wall should be anti-corrosion).
drainage project
1, sewage and classification: living, production, rain and snow water
2, drainage system: convergence, diversion
3, drainage system composition: outdoor and indoor
heating project
1, heating system classification
(1) Different from heat medium used: hot water, steam, hot air
( 2) According to circulation power: mechanical, natural
(3) According to the water supply and return method: single pipe, double pipe
(4) According to heating range: local, centralized, regional
2, basic form of hot water heating system
(1) upper supply and lower supply and lower supply and return double pipe
(2) lower supply and return double pipe
(3) vertical single pipe: order Type, leap type, adjustable sequential type, reverse flow type
(4) Single double pipe system
(5) Horizontal single pipe system
(6) Partition heating
(7) Same process, different route
3, main heating system equipment
(1) expansion water tank : (accumulate the pump suction port) fixed pressure, exhaust, and accommodate expanded water, signal Function
(2) Gas collection tank
(3) Telescopic: (used on the high-rise) Corrugated telescopic, sleeve telescopic, natural expansion telescopic
Ventilation and air conditioning
1, Air conditioning classification
(1) According to the settings of air processing equipment:
Centralized system: The air conditioning unit directly supplies each room
semi-centralized system: Water cooler unit - fresh air unit / fan coil
Fully dispersed system: Water cooler unit - fan coil
(2) According to the type of media used to bear the indoor load: full air system, full water system, air-water system, refrigerant system
(3) According to the centralized air conditioner, air source is divided into: closed, DC, hybrid
(4) According to the sub-part: empty Air regulating system, air conditioning water system, purification air conditioning system, refrigeration equipment system, water cooling unit, cooling tower
2, main equipment
air conditioning unit, fresh air unit, fan coil
3, ventilation system
(1) Exhaust and exhaust system: civil defense, basement, garage (steel plate, fiberglass)
(2) Smoke prevention and exhaust system (steel plate, glass Steel, structural air duct)
(3) Dust removal system
boiler classification and model representation method
1, classification
(1) By use: industry, heating, power station, locomotive
(2) By heat-carrying medium provided: steam, hot water
(3) By structure: fire Pipe, water pipe, water and fire pipe mixing
(4) According to fuel: coal, oil, gas
(5) According to combustion method: hand burning and mechanical
(6) According to complete installation method: quick loading, assembly, bulk
2, model representation method
0 my country's industrial boiler product model preparation method is carried out according to the jb1626 standard.Its model consists of three parts. The parts are separated by short lines.
The first part represents the boiler type, combustion method and rated evaporation or rated thermal power. The first paragraph uses two Chinese pinyin to represent the overall form of the boiler; the second paragraph uses a Chinese pinyin letter to represent the combustion method (the waste heat boiler has no combustion method code); the third paragraph uses Arabic numerals to represent the rated evaporation of the steam boiler, unit is t/h, or the rated thermal power of the hot water boiler, unit is mw (megawatts) or the heating surface of the waste heat boiler, unit is ㎡.
The second part represents the media parameters. It is divided into two sections, with diagonal lines in the middle. The first section uses Arabic numerals to represent the outlet pressure of the medium, and the unit is mpa (megapas); the second section uses Arabic numerals to represent the superheated steam temperature or the outlet water temperature and return water temperature, and the unit is ℃. The boiler producing saturated steam does not have this number.
The third part represents the type of fuel and the order of design. It is divided into two sections: the first section uses Chinese pinyin letters to represent the type of fuel, and Roman numerals represent the fuel classification and parallel it. If several fuels are used at the same time, the main fuel is placed in the front section and connected to write. There is no second paragraph for the prototype design.
2. Construction drawing reading
1. Design specifications require that the heating branch shall not be less than DN20.
2. Conventional insulation method
Water supply: anti-condensation insulation; hot water: insulation; fire protection: not insulation; refrigerated water: even valves need to be insulated; cooling water: according to design requirements, no production can be done without requirements. Generally, the pipes in the suspended ceiling need to be insulated.
Water supply: apply condensation to prevent condensation and insulation; apply condensation to prevent condensation and insulation from being exposed to the doors of the hall, bedroom and living room. Drainage: apply secretly to prevent condensation and insulation; apply openly to the public toilet seat to reverse the water.
pipe well without the fire protection and spraying pipes outside the pipes
3, galvanized steel pipe connection method
DN100 can be welded (need to anti-corrosion), flange welding (need to secondary galvanization), and a small amount of threaded flange connection.
4. The distance between the outer skin of the pipe and the wall is 25-50mm.
5. When the heating main pipe is connected to the riser, when the straight pipe section is 15m, two 90° elbows are used, and when the straight pipe section is 15m, three 90° elbows are used.
6. During construction, it is better to be high than low than to be low, and the floor drain is better to be low than to be high.
7. Elevation regulations: Indoor pipelines are generally in the pipe, outdoor pipeline drainage is the inner bottom of the pipe, and water supply is the top of the pipe.
8 and radiator should be coaxial with the window.
9, gate valve : switch action, resistance coefficient 0.5; shutdown valve : adjust switch action, resistance coefficient 19.
10, compensator is divided into: natural compensation, square expansion force, elbow, corrugated compensator , sleeve compensator, spherical expansion force, horny expansion force.
11. Gas collection tank: the end of the main pipe, its pipe diameter is 4-6 times the diameter of the end pipe. Expansion water tank: regulates pressure, exhausts, accommodates expanded water, and signal functions. Air pressure tank: pressure stabilization and exhaust.
Expansion water tank has five pipelines: expansion pipe, circulation pipe, overflow pipe, sewage pipe, and signal pipe.
installation position of the gas collector tank: the pipeline interface is 2/3 from the upper end of the gas collector tank and 1/3 from the lower end.
12. According to the standard picture album, grasp the thermal media entrance situation.
13, PP-R pipe can be used for aluminum-plastic composite pipe or water supply U-PVC pipe quota.
14, waterproof casing
(1) Rigid waterproof casing: Type I waterproof casing, Type II waterproof casing, Type III waterproof casing
Type I waterproof casing is suitable for cast iron pipes and non-metallic pipes; Type II waterproof casing is suitable for steel pipes; Type III waterproof casing is suitable for steel pipe pre-embedded, and the wing ring is directly contained on the steel pipe.
(2) Flexible waterproof casing : Generally suitable for structures where pipes are subject to vibration or strict waterproofing requirements when passing through walls.
Generally, the pipes that pass through the exterior walls are waterproof casing. The pipes passing through the pool use flexible waterproof casing.
If the outdoor water level is high, a flexible waterproof casing is used, and if the outdoor water level is low, a rigid waterproof casing is used.
15. Generally, the diameter of the water meter pipe is one size smaller than the diameter of the pipe.
16. Any water supply branch pipe is connected to more than two water supply points, and the branch pipe is equipped with a retractable joint and flange. Except for branch pipe water meter.
17. Regulations: The upper edge of
washbasin (watering basin) is 800mm away from the ground.
water nozzle is 200mm from the upper edge of the washbasin.
mop pool water nozzle is 300mm from the upper edge of the mop pool.
seat water supply is 250mm away from the ground.
washbasin water supply is 450mm away from the ground.
18. Valves and loose joints must be added when the riser comes out of the ground.
19, fire hydrant
single bolt DN65 specification: the bolt port is facing outward and should not be installed on the door shaft side;
double bolt DN65 or DN50 fire hydrant box has a thickness of 240mm, and the center of the bolt port is located at the ground.
single plug + self-rescue reel 1.1m.
20. Installation of water meter
Residential: Valve + Water meter
Public buildings: Valve + Water meter + Valve
Outdoor: Valve + Water meter + Valve + Water discharge valve + Shock absorption, etc.
21. cleaning port : Two or more sanitary appliance branches should be connected to the branches of the sanitary appliances. If there is a floor drain, you can not add it.
riser inspection port: the bottom and the highest layer must be set, and every one to two layers.
Main tube length travels through several rooms every 8-12m.
22. The diameter of the riser must be small and small, and the branch pipe can be filled with a center, such as the diameter of the water connection meter.
23 and drainage pipes elbow tees:
horizontal pipe and riser should use 90° inclined three-way or four-way;
horizontal pipe and cross-way should use 45° three-way or four-way;
horizontal pipe and drainage main pipe (such as the exit pipe) should use 2 45° elbow or 90° elbow with a radius greater than 4 times D.
24, water storage curve : P-type - squat stool S-type - washbasin, urination .
3. Standard
1. Water supply and drainage and heating
(1) Before installation, strength test should be performed, and 10% should be drawn from a batch. If 10% is drawn, the pass rate is 95% or 99.9% is unqualified. Strength test pressure = nominal pressure *1.5; Strength test pressure = nominal pressure *1.1.
(2) The closed-circuit valves installed in the main pipe that play a cutting role should undergo strength and tightness tests one by one.
(3) The outer diameter of the stamped elbow on the pipeline should = bend outer diameter
Ordinary stamped elbow Welded steel pipe
Seamless stamped elbow seamless steel pipe
Welded steel pipe DN100 Nominal diameter
Seamless steel pipe Φ100*4.5 Outer diameter * wall thickness
Spiral welded pipe D109*4.5 Outer diameter * wall thickness
(4) Waterproof measures should be taken when there is a pipe passing through the exterior wall of a basement or underground structure, and flexible waterproof casing should be used for strict requirements.
rigid waterproof casing: Generally, when the design is not required,
flexible waterproof casing: the design required part; structure with high ground water level; pool
(5) The following measures should be taken when laying the pipeline through expansion joints, settlement joints, and seismic joints: add
a. Add telescopic joints: feed water, spray and add rubber soft joints; refrigerated water and stainless steel soft joints;
b. Leave clearance: Leave a clearance of no less than 150mm on the upper and lower parts of the outer skin of the pipeline or insulation layer;
c. Make a compensator: Make a square compensator at the wall and install it horizontally.
(6) The bracket should be positioned correctly and should be buried flat and firmly:
a. Equipment and accessories should be equipped with hangers, brackets, and brackets. Ends, elbows, and tees. Arrange evenly according to the standard spacing (Note: Anti-shaking brackets should be used at the end of the spraying).
(7) The fixed brackets should be in a reliable and tight contact with the pipeline.
(8) There should be 3-5m gap between the sliding bracket, sliding drag and chute.
(9) Pipe hanging frame without thermal expansion and contraction boom should be installed vertically, and the pipe hanging frame boom with thermal expansion should be reversely tilted towards the direction of thermal expansion.
(10) The pipe support hanger fixed to the building structure does not affect structural safety.
(11) Settings of the riser pipe card of heating, water supply and hot water system:
a. The floor height is 5m. Each floor must be equipped with 1
b. The floor height is 5m. Each floor must not be less than 2
c. The installation height of the pipe card is 1.5-1.8m away from the ground, and the two pipe cards are symmetrical. When the water supply and drainage pipe diameter of multi-story buildings is greater than 25mm, there may be no brackets on the riser, but a pipe pier should be added on the bottom floor of the drainage pipe.
e. The stand should be made into a floor-standing card for drainage cast iron and water-feeding galvanized steel pipe risers.
(12) The telescopic pipeline should be added with casing, heating, hot water, freezing, cooling, condensate through the wall and floor slabs should be added with casing, and water supply, fire fighting, spraying, and drainage are not necessary.
(13) Water supply pipe: galvanized steel pipe DN100 flange or clamp connection; water supply plastic pipe and composite pipe can use rubber ring interface, bonding, hot melt, special pipe fittings and flanges; water supply cast iron pipe: cement sticking or rubber ring; copper pipe: special joints or welding.
(14) After the bolt is tightened, the nut length screw diameter should be 1/2 of the screw connection, and the threaded connection should be exposed to 2-3 buckles.
(15) The water supply riser and the water distribution point branch pipe equipped with 3 or more should be installed with removable connectors (such as loose joints) at the beginning, but if there is a water meter or flange valve, it is not necessary to add it.
(16) Hot and cold water: hot at the top and cold at the bottom, hot at the left and cold at the right.
(17) Anti-corrosion treatment: buried drainage cast iron pipe: asphalt anti-corrosion; buried steel pipe (including galvanized steel pipe): three-level anti-corrosion.
(18) The water tank overflow pipe and drain pipe should be located near the drainage but should not be directly connected to the drainage pipe.
(19) Vertical water pump shock absorption should not use spring shock absorber .
(20) Indoor drainage pipes: U-PVC drainage pipes, cast iron pipes, concrete pipes can be used for the short pipes that form the washbasin and the drinking water sprinkler to the shared water seal and connect the drainage pipes of sanitary appliances.
The branch tube DN100 with 1 toilet, the branch tube DN150 with 1 toilet tank, and the branch tube DN75 with more than 3 sanitary appliance branches.
(21) Indoor rainwater pipe: water supply cast iron pipe, water supply plastic pipe, galvanized steel pipe, black pipe (internal anti-corrosion).
(22) Add one to the riser inspection port every other layer, and sanitary equipment must be added on the bottom and the highest floors.
(23) The drainage riser and main pipe (such as the inlet pipe) should be tested for ball through , with a ball diameter of 2/3 of the diameter of the drainage pipe. The U-PVC drainage riser should be equipped with a telescopic joint or a tee (with telescopic joint) and a fire retardant ring (or fire-proof sleeve). The spacing between telescopic joints is ≤4 meters.
(24) Connecting 2 or more toilets or 3 or more sanitary utensils should be equipped with sweeping outlets. (Clearing equipment)
(25) Horizontal pipes and horizontal pipes, horizontal pipes and vertical pipes should use 45-degree tees or 45-degree quadruple connections, 90-degree quadruple connections or 90-degree quadruple connections. The riser and drainage pipe should use 2 45-degree elbows or 90-degree elbows (TY tees) with a curvature radius of that is not less than 4 times the diameter of the pipe.
(26) The drainage vent pipe is 300mm higher than the roof, and must be greater than the snow thickness (non-top roof). Beijing stipulates that it is 600mm.
(27) When the outdoor drain pipe passes through the wall or the foundation must be reversed, a 45-degree elbow or tee should be used, and a sweep outlet should be set up in the vertical pipe section.
(28) Indoor hot water is divided into: full circulation, semi circulation, and non-circulation. Hot water pipes should try to make use of natural compensation for thermal expansion (elbows, square expansion forces).
(29) The water pipe should be flushed, and the tank body should not undergo water pressure tests only for irrigation tests. Hot water supply and return water, water collection tank, water distribution tank, hot water tank, etc. should be insulated. Open water tanks should be fully watered tests, and closed water tanks should be water pressure tests.
(30) Sanitary utensils should be installed with embedded bolts or expansion bolts . Sanitary equipment should be fully watered and water-flow tests.
The height of the water supply pipe is: washbasin 450mm, toilet 250mm, bathtub 670mm, shower 1150mm, squat piping (manual self-closing) 600mm, vertical urinal 1130mm, hanging urinal 1050mm.
(31) Indoor heating steel pipe: Welded steel pipe DN32 welding.
(32) Pipeline slope: The slope of steam and water hot water pipes, steam pipes and condensate pipes is 3‰,000, and shall not be less than 2‰. The steam flows against the direction, and the slopes of hot water and steam pipes are greater than or equal to 5‰. The slope of the radiator branch pipe is equal to 1%, and the slope should be conducive to drainage and drainage.
(33) balance valve and regulating valve (system main pipe) both have directions and pressure ranges.
(34) Square compensator should be made of a whole seamless steel pipe.
(35) When the length of the radiator branch pipe is 1.5m, the pipe card should be installed.
(36) The diameter of the hot water main pipe of the upper and lower return system should be connected with the top flat and eccentric, and the diameter of the steam main pipe should be connected with the bottom flat and eccentric.
High temperature water (110~130℃) add flange or flange valve.
It is best not to use a loose joint in the pipe in a non-high temperature water ceiling, but use a flange valve or threaded valve plus a pair of flanges.
(37) The radiator has foot pieces, 2 legs below 14 pieces, and 3 legs above 14 pieces. More than 20 pieces of strips.
(38) Filter: Add at the inlet of the water pump, smaller.
(39) dirt remover, heating system entire building, heat exchange station , boiler room water return house dirt remover, larger.
desiccant usually requires a bypass pipe. The main equipment for clearing and prone to damage should be equipped with bypass accessories. The purchased air ducts selected in the project must also provide corresponding product qualification certificates or verify strength and tightness.
(2) ventilation duct specification acceptance, the air duct shall be based on the outer diameter or outer edge length, the air duct shall be based on the inner diameter or inner edge length, the irregular elliptical air duct shall refer to the rectangular air duct, and shall be based on the long diameter plane length and the short diameter dimensions.
(3) galvanized steel plate and various steel plates containing composite protective layers should be connected by bite or riveted, and welding connection methods that affect the corrosion resistance of their protective layer shall not be used.
(4) The sealing of the air duct should be mainly sealed with the plate connection, and sealing can be sealed using sealant caulking and other methods. The performance of the sealant should meet the requirements of the use environment, and the sealing surface should be installed on the positive pressure side of the air duct.
(5) Air duct material: ordinary steel plate, galvanized steel plate, stainless steel plate , hard polyvinyl chloride, plexiglass fiberglass, inorganic fiberglass (the corresponding number of glass cloth layers is not less than the specifications, and the surface shall not be anti-halogen or severe frost).
(6) The body, frame, fixing materials and sealing materials of the fire-proof air duct must be non-combustible materials, and its fire resistance grade should comply with the design regulations.
(7) The covering material of composite air duct must be non-combustible material, and the internal insulation material should be a flammable B2-level and harmless to the human body.
4. Quota Lecture
1. Drainage and heating quota
(1) Division of station-type pipelines and indoor pipelines: the exterior wall of the station or computer room is the same.
(2) Dividing of indoor pipelines and outdoor pipelines: the exterior wall of the building is bounded by 1.5m.
(3) Dividing of outdoor pipelines and municipal pipelines: steel pipe DN150 municipal; seamless steel pipe φ159 outdoor, Φ159 municipal; cast iron DN250 municipal.
(4) Operating height: ultra-height coefficient 5m, refers to the distance between the installation height of the operating object or equipment from the ground of the same layer. Base: artificial day* ultra-high coefficient.
(5) Extra high fee for high-rise buildings: eaves height 25m, fee base: labor fee * Extra high fee for high-rise buildings.
(6) Heating system debugging fee: unit project labor fee * 14% (excluding heat source fee), of which labor fee accounts for 78% of the debugging fee.
(7) Scaffolding usage fee: unit project labor fee * 2%.
2, indoor pipeline
Understanding: pipeline pressure, material, and connection methods are different
(1) Pipe room pressure: a low-level pressure test is enough; high-level layer pressure test, single pressure test, system pressure test and hidden engineering, etc.
(2) Low pressure galvanized steel pipe (wire-connected) DN32 inner tube clamp is included.
(3) Low-pressure galvanized steel pipe (welded) does not contain hanger , and the pipe fittings are already included (finished product: elbow, on-site processing: three-way opening).
(4) Low-pressure galvanized steel pipe (flange connection) requires secondary galvanization, flange sheet and cost are not included.
(5) Groove connection (clutch connection) is used for water supply and drainage, fire protection and gas; mechanical or open-hole connection: commonly used for tees; pipe fittings: groove connection.
(6) Water supply cast iron pipe: often used in buried house pipes (cast iron pipes are more mechanically strong than steel pipes and are corrosion-resistant).
(7) Drainage cast iron pipe: auxiliary breathable pipes must be installed on horizontally connecting 6 toilets or high-rise buildings. Auxiliary breathable pipe fittings, their caps, and riser inspection ports are included in the quota in the form of content and do not need to be calculated separately.
(8) Flexible drainage cast iron pipe: rubber flange interface A type; W type hinge connection.
(9) Aluminum-plastic composite pipe: brass pipe fittings connection or sleeve connection , and threaded connection between pipe fittings. Aluminum-plastic composite pipes and PVC-U water supply plastic pipes contain installation fees for pipe fittings and steel-plastic conversion joints, but do not contain the main material, with a content of 1.01.Aluminum-plastic composite pipe DN32 contains pipe cards.
(10) U-PVC drainage plastic pipe fittings already contain: breathable cap, telescopic joint, vertical inspection port and toilet connecting pipe (squat toilet) do not need to be calculated separately; fire ring or fireproof sleeve must be provided separately.
(11) PPR pipe : Wire joints and performs galvanized steel pipe sub-item; bonds and performs UPVC water supply plastic pipe; hot melt welding performs Chapter 8 Gas pipeline PE pipe electric hot melt.
3, budget price
(1) The budget price of the material consists of three parts: supply price, storage fee, and procurement fee. Among them, the supply price is composed of the following parts: freight costs from other places, packaging costs, handling fees from supply and marketing departments, and exit fees.
(2) The price on the cost information is the price transported to the construction site, but does not include a 2% storage fee.
(3) Preparation of the mechanical shift fee quota: depreciation fee (recovering its original cost within the specified scope of use), maintenance fee (overhaul fee, maintenance fee).
(4) Project cost includes: direct fee , enterprise management fee (deducting the project department's medical and pension), profits and taxes. The direct fees include: labor costs, materials costs, machinery costs and on-site management fees (the on-site management fees include temporary facilities costs and on-site expenses).
4, outdoor pipeline
(1) The joints between old pipelines and new pipelines: Part 12 of heat source for heat source; Part 13 of water supply pipes for outdoor water supply cast iron pipes plus tee water source joints.
(2) Sand filling: It is calculated based on the design requirements and may not be filled. It is suitable for direct buried insulation pipes and direct buried pipes.
5, station-type pipeline
(1) Welded pipe fittings: The finished product is equipped with low-pressure welded steel pipe fittings to install and replenish the main material; the on-site production and processing are used to install low-pressure welded steel pipe fittings, and there is no need to replenish the main material.
(2) Various pipe fittings processed on-site, including tee connection on the main pipe, slamming and reducing diameter pipes, etc., all perform the corresponding sub-item for connecting the pipe fittings, and no longer count the main material cost of the pipe fittings. If the tee connection branch pipe is less than 1/2 of the main pipe diameter, the specifications of the pipe fittings shall be calculated according to the diameter of the branch pipe; if the diameter of the branch pipe is greater than 1/2 of the main pipe diameter, the specifications of the pipe fittings shall be applied according to the diameter of the main pipe.
6, valve and flange
pressure reducing valve group composition: pressure reducing valve, valve, bypass pipe, elbow, pressure gauge, etc.
7, Sanitary ware
(1) Squat toilet: If you use UPVC drain pipe, the squat toilet connection pipe is not only counted, but is included in the joint parts.
(2) Toilet: If it is rear drainage, perform a single toilet soft joint installation (between the pipe and the toilet).
(3) Urinal and defecation tank: Rinse the water tank production and execute Chapter 9 Water tank production. Flush the water tank bracket to perform Chapter 13 Equipment bracket production.
(4) Civil engineering mop pool: floor-mounted installation and water nozzles and floor drain installation; tabletop water nozzles and drainage bolts with water storage bends; washbasin and water nozzles without water storage bends; multi-faucet washing tanks perform multiple water nozzles and drainage bolts with water storage bends. If there is a floor drain, water nozzles, drainage bolts without water storage bends and floor drainage bolts without water storage bends.
(5) The washing machine interface performs the water nozzle installation, and change the main material: the washing machine faucet.
(6) Installation of multi-function floor drain and tub drainage storage box (cabinet) to perform the installation of three-purpose drains.
(7) The horizontal cleaning port performs a sweeping outlet (the sweeping outlet must be set up to connect more than two toilets or more three water utensils).
(8) The riser inspection port, breathable cap and telescopic section are contained in the pipe fitting content and do not need to be calculated separately.
(9) The hanging spacer drag (bracket) must be calculated separately.
(10) The equipment trailer oil brushing requires the metal bracket brushing.
8, heating equipment
(1) Cast iron radiator: Generally, it is necessary to set up on site, and the same sub-item is implemented regardless of the installation. Each group has foot pieces and no foot pieces on the ground. There is no distinction between hanging and installing, only the middle film.
(2) Floor-mounted radiator: less than 14 pieces, 2 with foot pieces, 15-20 pieces, 3 with foot pieces.
(3) When each group of column cast iron radiators is installed with more than 20 pieces, the strips need to be pulled. The cost of strips is calculated separately. Use φ6 round steel to perform the metal bracket production and installation sub-item. The interface sealing materials listed in the
(4) quota are all prepared according to the finished glue pad , and shall not be adjusted if it does not match the design.
(5) Steel closed radiator: generally refers to the finished product, mostly hanging type, unit: sheet refers to the group, the quota includes the installation of the drag hook. If the bracket is finished, the main material does not include the drag hook, and the drag hook will be supplemented separately. The quota contains the air discharge door wire blockage. If a manual air discharge valve is installed, the manual air discharge valve installation will be carried out.
(6) High-frequency welding fin tube radiator: The quota includes the installation cost of the protective cover, but does not include its own value.
(7) Multi-column steel pipe radiator: Can be used for hot water or steam, such as Send radiator.
(8) Radiation convection radiator installation, regardless of whether it is mounted or floor-mounted, the same quota is implemented, and the floor-mounted support is prepared according to the main material.
(9) light discharge pipe radiator : Type A and Type B production and installation, the work materials used for the joint pipe have been included in the quota and shall not be calculated separately.
(10) Gas collection tank and automatic exhaust valve: used for the highest point of the hot water heating system, and the valves and air discharge ducts on them will be calculated separately.
(11) Heater installation: No bracket production and installation, Chapter 13 will be completed and installed according to the equipment bracket.
(12) Low-temperature floor radiant heating: calculated in meters according to the laying method. Generally, there cannot be pipe fittings, and the quota does not include insulation networks, and civil engineering calculations. The quota includes ground pouring and cooperation in construction. This project is implemented when using aluminum-plastic composite pipes, polybutylene pipes, polypropylene pipes, polyethylene pipes and other pipes as floor heating pipes.
(13) The heating system debugging fee will be calculated separately and entered into the withdrawal fee.
9, fire protection system
(1) Location of pressure relief orifice plate: connect the movable joint before the fire hydrant, connect the flange before the fire hydrant, and take the pipe connection after the fire hydrant. Flange installation will be calculated separately.
(2) Outdoor underground fire hydrant wells implement the first volume civil engineering quota.
(3) During the installation of gas drive device pipelines, the number of card sleeve connectors is calculated separately according to the quantity used in the design drawings.
(4) The storage device holder bracket is calculated separately, and the corresponding sub-item of the equipment holder in Chapter 13 is executed.
(5) In the installation of storage device, the quota includes the installation of storage devices such as fire extinguishing agent storage containers, system components, safety valves, etc. and the installation of storage devices and valve drive devices, as well as nitrogen boosting. Nitrogen dioxide storage device does not require gas pressure. Pure nitrogen should be deducted when implementing the quota, and the rest will remain unchanged.
10, gas pipeline
(1) Polyethylene pipeline: PE pipe, pipe fittings are calculated separately. Connection method: small pipe diameter electromelt; large pipe diameter thermal melting.
(2) Polyethylene pipe fitting connections are suitable for connecting various pipe fittings such as polyethylene tees, elbows, pipe plugs, variable diameters, sleeves, etc.
(3) Steel-plastic conversion joint: Whether it is wire joint, welding, or flange connection, the same sub-item is performed; if it is a flange connection, the value of the flange itself is calculated separately, and the bolt is calculated based on the amount of the design drawing and the loss rate is calculated.
(4) The PE pipes within the gas pipeline φ315 are implemented in accordance with the gas pipelines in Chapter 8, and the gas wells are charged according to the construction projects in the first volume; PE pipes outside the φ315 are used as supplementary projects, and the gas wells are implemented in the municipal pipelines in the gas pipelines.
11, low-pressure container
(1) The assembled water tank includes the production and installation cost of steel chassis, and other equipment brackets are calculated separately.
(2) Frequency conversion water supply device: pressure controller in the air pressure tank is provided with the equipment. If the soft connector in the frequency conversion pump group is included in the main material price, otherwise it will be calculated separately.
(3) The equipment that needs to be insulated shall be carried out as a sub-item for the equipment insulation quota.
(4) Grouting between equipment and foundation generally refers to secondary grouting.
(5) Production and grouting of anchor bolts: If the equipment comes with its own anchor bolts and grouting; if the equipment is not equipped with it, use equipment anchor bolts to make and grouting.
(6) Off-site transportation: generally used in conjunction with water tank production. If the finished product is installed, the cost will be included.
12, Boiler
(1) If it is a gas boiler, the light fuel oil used in the boiler and the furnace should be converted into gas.
13, pump and shock absorption
(1) If the pump is not equipped with anchor bolts, perform the installation according to anchor bolts.
(2) Shock-absorbing connection plate.
14, casing and support hanger
(1) Process flow: reserved holes, prefabricated casing, plugged holes, anti-rust prefabricated brackets,
pipe anti-rust prefabricated pipe sections,
(2) Support hanger calculation, unit 100kg, 96-year estimated quota steel volume is applied.
(3) 13-79 General pipe frames are suitable for general pipes; 13-80 Wooden cushion pipe frames are suitable for air-conditioning water systems, and do not include wooden cushion price chromium, and purchase them according to ㎡ (about 1,900 yuan/m³); 13-81 Spring cushion pipe frames are suitable for support and hangers with special design instructions. If there is a vertical displacement movable bracket, the quota does not include spring chromium.
drainage UPVC pipe card is purchased from the finished product, and the hanging rack-type fixing card should be folded into the main material.
(4) Casing: General filler casing.
fillerless steel casing: perform the welded steel pipe installation, and calculate it in m to be 2 larger than the pipe diameter.
Waterproof casing: rigid, flexible.
Fire retardant ring: UPVC drain pipe.
(5) Use fillerless casings through the wall of the upper and lower water pipes, and do not use sleeves through the drainage pipes through the floor slab; use general filler casings through the heating pipes, and use asphalt through the floor slabs.
15, pipeline hydraulic test and flaw detection
(1) Pipeline hydraulic test: The pipeline itself contains a primary pressure test. If the construction design requires a secondary pressure test, the hydraulic test quota will be implemented. The pressure test liquid refers to the liquid other than water. If the liquid other than water is water, the pressure gauge and valve enter with amortized material, the pressure gauge is 0.1 and the valve is 0.2.
(2) Pipeline gas pressure test: The pipeline that conveys gas needs to undergo a pressure test, and the external pipeline needs to perform a pressure test.
(3) Pipe leak test: suitable for pipes that transport highly toxic, toxic and combustible media. Such as the interior part of the gas pipeline.
(4) Pipeline vacuum test: Copper pipes in air conditioners, water tanks, etc. need to undergo vacuum tests.
(5) Water flushing: All pipes with water that are water need to be rinsed with water, heating pipe fluid needs to be rinsed with water, and drainage pipes are not made.
(6) Pipe disinfection and rinsing: suitable for domestic cold water, hot water and drinking water.
Such as buried water supply pipe (drinking water): Press, rinse, and disinfect.
Buried fire pipes: press and flush.
(7) Compressed air purge: The outdoor natural gas pipeline needs to be purged after undergoing hydraulic tests.
(8) Inlet ball test: used in sewer pipes, water closure test has been included in the drainage pipe installation quota. The drainage ball test needs to be applied separately, generally refers to the drainage main pipe and the riser pipe (branch pipe does not need to be done, but if it is the connection between the seat, squat and the main pipe, it needs to be done, that is, the pipe flowing block object must be done.
(9) Pipe pickling and alkaline washing: suitable for process pipelines.
(10) Degreasing test: oxygen pipeline.
(11) Flaw detection: such as municipal pipelines.
16. Painting and insulation
(1) The amount of paint brushing of cast iron radiator is 0.2 8㎡/piece.
(2) Production and installation of insulation drag tray: Condensation water vertical pipe at the occurrence site; hook nails: hook nails when the diameter of the horizontal main pipe is large; galvanized steel plate insulation box is used on valves and flange insulation.
(3) Direct buried insulation pipe joint: suitable for outdoor direct buried pipes.
ventilation, air conditioning quota
ventilation pipes and components
power system: blower, return fan; air processing system; air delivery system: muffler, balance valve; air division Clothing system: louver, exhaust port, air supply port.
(1) Ventilation duct: thin steel plate, fiberglass and composite type.
(2) Measuring principle: no deduction of elbows, tees, and variable diameters; valve components are deducted. Special: elbow guide blades, no deduction of application production and assembly quota during measurement; silence elbows are deducted, and silence elbows are installed with silence elbows.
(3) Fireproof valves, mufflers, static pressure box and mufflers have included support hangers to install.
(4) When mufflers are continuously installed Calculate 2 silencers.
(5) The expansion area of the static pressure box is calculated based on 6 sides, and no holes are deducted.
(6) The concentric bent pipe of rectangular air duct must be set when the large side length (horizontal side length) is 500mm.
(7) The position of the inspection hole: When the air duct is long, one at the end; if it is a comfortable air conditioner, it can be set; it is necessary to set a constant temperature and humidity air conditioner; it is necessary to set a check hole for high-quality filters.
(8) Determination hole: set at the entrance and exit of the main pipe and branch pipe.
(9) System tightness: The area of the air duct tested as needed is calculated in ㎡.
