Taking the 450,000-ton ethylene glycol project as an example, the unit projects are divided into: 1. Implementation standard for unit project division: SH/T 3508-2011 "Uniform Standard for Construction Quality Acceptance of Petrochemical Installation Projects" 2. Inspection batch

Taking the 450,000 tons ethylene glycol project as an example, the unit projects are divided:

1. Implementation standards for unit project division: SH/T 3508-2011 "Uniform Standards for Construction Quality Acceptance of Petrochemical Installation Projects"

2. Inspection Batch number: HDSH-Main item number-01-01-01-01

For example: HDSH (project name)-01702 (unit project)- 1 (sub-unit project)- 1 (division project)- 1 (sub-project) - 1 (inspection batch) Notes are as follows:

• HDSH: Hengda Petrochemical
• 01702: Main item number --- unit project , see the design document for details, main item number: 01702 means "coal slurry preparation"
• The first 1 means Sub-unit project : Steel structure installation project, please see SH/T 3508-2011 Appendix C
• (1) 01---Steel structure installation project
• (2) 02---Static equipment installation project
• (3) 03-- - Moving equipment installation project
• (4) 04 --- Pipeline installation project
• (5) 05 --- Electrical installation project
• (6) 06 --- Instrument installation project
• (7) 07 --- Telecommunications installation Project
• The second 1 means: branch project, see SH/T 3508-2011 Appendix C
• (1) If the sub-unit project is steel structure installation , then 01 here means: pipe gallery/pipe frame structure, the same Management: 2---frame/tower structure; 3---grid/ truss structure

• (2) If the sub-unit project installs for static equipment, then 01 here means: tower/reactor equipment, the same Management, 2---container/ heat exchanger equipment; 3---reaction regeneration system equipment; 4---insulation and wear-resistant lining; 5---air-cooled heat exchange equipment; 6---spherical storage Tank; 7---storage tank/ gas cabinet ; 8---silo; 9--- heating furnace /boiler (1/n); 0---furnace building; 1---other static equipment.

• (3) If the sub-unit project is to install for moving equipment, then 1 here means: reciprocating compressor group (1/n), similarly, 2--- centrifugal compressor (1 /n); 3---axial flow compressor-flue gas turbine unit (1/n); 4---pump unit (divided by structural category); 5---universal fan (divided by structural category); 6 ---Other moving equipment (divided by structural category)

• (4) If the sub-unit project is moving pipeline installation , then 01 here means: process pipelines are classified according to pipeline grade and material category. Similarly, 2--- fire pipe ; 3---water supply pipe; 4--- drainage pipe .

• The third 1 represents the sub-project . For details, please refer to SH/T 3508-2011 Appendix C (above table)
• Example 1: HDSH-01702-01-01- 1: Hengda Petrochemical-Coal Slurry Preparation-Steel Structure Installation - Pipe Gallery Structure - A Pipe Gallery
• Example 2: HDSH-01702-01-01- 2: Hengda Petrochemical - Coal Slurry Preparation - Steel Structure Installation - Pipe Gallery Structure - A Pipe Gallery Anti-corrosion
• Example 2: HDSH-01702 -01-01- 3: Hengda Petrochemical - Coal Slurry Preparation - Steel Structure Installation - Pipe Gallery Structure - A Pipe Gallery Fireproof Coating

The rest of the details are shown in the picture above. The serial numbers specified above represent fixed modules and remain unchanged. In time, the unit project is in progress If there is no static equipment, then no static equipment code is needed, and other code names must remain unchanged.

• The fourth 1 represents the inspection batch serial number , and continuity must be maintained.