HG/T 20646.1-1999 Chemical plant piping material design content and depth regulations
Some standard content:
Chemical plant piping material design
Content and depth regulations
HG/T20646.1—1999
1 Composition and brief description of chemical plant piping material design documents 1.1 Composition of design documents
The main documents of chemical plant piping material design (engineering design) are as follows: 1.1.1
Catalogue of professional drawings for piping material control;
Pipeline material design instructions;
Pipeline material grade index;
Pipeline material grade table;
Pipeline wall thickness table;
Pipeline branch connection table;
Regulations on the demarcation of pipeline and instrument materials;
Regulations on thermal insulation design;
Regulations on anti-corrosion and painting design;
Engineering standards for pipeline materials;
Summary list of equipment thermal insulation materials:
Summary list of pipeline thermal insulation materials;
Summary list of equipment painting materials;
Summary list of pipeline painting materials;
Summary list of comprehensive pipeline materials:
Non-standard pipe fittings drawings;
Pipeline material purchase documents;
Insulation construction instructions;
Painting construction instructions;
Pipeline material construction instructions.
1.2 Brief description
Catalogue of professional drawings for pipeline material control
Only lists the catalogue of design documents that need to be sent to users and construction sites. 1.2.2 Pipeline material design description
Describe the standards, specifications, units, materials, markings, tests, inspections, etc. of the pipeline materials used in the project; select and specify the sizes and tolerances of commonly used pipes, pipe fittings, valves, flanges, gaskets, bolts, studs (nuts).
1 The sizes of commonly used pipeline materials (valves, flanges, pipe fittings, etc.) have been specified in the corresponding standards and do not need to be selected by users.
2 The size tolerances of commonly used pipeline materials have been specified by the corresponding standards and do not need to be selected by users. 3 If the user has special requirements for the size and tolerance of pipeline materials (i.e. special requirements of the project that do not meet the standard specifications), corresponding regulations can be made.
1.2.3 Pipeline material grade index
For a specific project, a brief description of how all fluids are divided into several grades according to pressure, temperature and materials used.
1.2.4 Pipeline material grade table
For a certain pipeline grade, the standards, materials, sizes, models, etc. used for all pipeline components including pipes, fittings, valves, flanges, gaskets and bolts (nuts) and other accessories are specified. 1.2.5 Pipeline wall thickness table
For a specific grade, the wall thickness of pipes of various grades of pipe diameters used in the project is specified and listed in a table.
1.2.6 Pipeline branch connection table
For each specific grade, the root connection form used for the branch pipe leading out from the main pipe is specified. 1.2.7 Pipeline and instrument material demarcation regulations| |tt||The instrument measuring elements on the pipeline are classified into "components" according to the instrument type and pipeline grade, so as to ensure that the components used by the pipeline and the instrument are correct, leak-free and matched with each other. 1.2.8 Thermal insulation design regulations
Specific regulations are made for the requirements of thermal insulation grade, thermal insulation materials, thermal insulation thickness and thermal insulation structure. 1.2.9 Anti-corrosion and painting design regulations
Specific regulations are made for the requirements of anti-corrosion grade, anti-corrosion materials, anti-corrosion requirements and paint color. 1.2.10 Pipeline material engineering standards
Pipeline material engineering standards mainly include the contents of pipeline components that are not included in national standards and industry standards and cannot be met, and effective pipeline material engineering design regulations are formulated for a specific engineering project. 1.2.11 Summary of equipment insulation materials A statistical table of the main and auxiliary materials used for the insulation of all equipment that needs insulation in the engineering design. 1.2.12 Summary of pipeline insulation materials 2
A statistical table of the main and auxiliary materials used for the insulation of all pipelines that need insulation in the engineering design. 1.2.13 Summary of equipment painting materials
A statistical table of materials used for the painting of all equipment that needs external corrosion protection in the engineering design. 1.2.14 Summary of pipeline painting materials A statistical table of materials used for the painting of all pipelines that need external corrosion protection in the engineering design. 1.2.15 Comprehensive material summary table
For pipeline material control professionals and users to purchase and inquire, a summary material table classified and zoned by pipeline installation materials, with design quantity and purchase quantity.
1.2.16 Non-standard pipe fittings drawing
Design drawings for the manufacture and inspection of non-standard pipe fittings used in pipelines in engineering design. 1.2.17 Pipeline Material Purchase Documents
A set of design documents for purchase written during the engineering design, including: purchase order, drawings (if any), design data sheet and pipeline material purchase instructions, etc. Documents for the engineering standards adopted in this project and the requirements for the manufacturing, inspection and testing of the purchased materials. 1.2.18 Insulation Construction Instructions
Describe the insulation materials and insulation grades used in the project, and specify the specific requirements and acceptance specifications for construction.
1.2.19 Painting Construction Instructions
Describe the paint materials and paint grades used in the project, and specify the specific requirements and acceptance specifications for construction.
1.2.20 Pipeline Material Construction Instructions
Describe the material, standard, manufacturing, testing, inspection, packaging and transportation of the materials, and specify the specific requirements and acceptance specifications for construction.
2.1.1 Purpose
2 Design description of piping materials for chemical plants
The design description of piping materials is a unified regulation made by the engineering company (design institute) for the piping materials used in the design plant, and makes specific regulations for the selection of piping materials for engineering design. It is mainly for the selection of process systems, pipeline layout, off-site pipelines, instruments, pipeline machinery, equipment and other professionals, and for reference by users and construction units. 2.1.2 Scope.
2.1.3 Standards and specifications.
2.1.4 Units.
Material standards.
2.2.2 Special instructions for limited use of materials.
Material description.
2.3 Dimensional tolerances and standards and specifications
General description.
Pipe.
Valve.
Flange.
Fittings.
Gasket.
Bolts (columns) and nuts (for pipe flanges). Weld end treatment.
Thread.
Sealed welding and thread sealing.
Pipe.
Valve.
2.4.3 Flange.
2.4.4 Pipe fittings.
2.4.5 Gasket.
2.4 Provisions for pipeline materials
Bolts (columns) and nuts (for pipe flanges).
2.5 Marking
According to the project regulations, different pipeline materials shall be marked according to the corresponding regulations. In order to facilitate on-site identification and management, materials of different materials can also be marked with specified colors. 2.6 Test and inspection
Scope.
Standards and specifications.
Related engineering standards.
2.6.4 Test and inspection data.
Test and inspection items.
Test and inspection procedures.
Test and inspection reports.
3 Pipeline material grade index
3.0.1 Pipeline material grade index is one of the main documents compiled by pipeline material control professionals. During the basic engineering design stage, it can be used by professionals such as process systems, pipeline layout, off-site pipelines, instruments, pipeline machinery, and equipment. 3.0.2 The basic content and reference format of the pipeline material grade index table are shown in Table 3.0.2. XXXXXX Engineering Company
Grade No.
Remarks:
General process materials
Preparation/verification
Table 3.0.2 Pipeline material grade index
Pipeline material grade index
Temperature range
File No.:bZxz.net
Main item No.
Flange type and basic material
2.5MPa raised face flat welding flange
HG20594—97
3.0.3 Common abbreviations of pipeline grade table
Groove end
Flange cover
Welded branch pipe
Electric fusion welding
Resistance welding
Flange cover veneer
Full plane
On-site welding
Single-head bolt
Smooth pipe end
Plate loose sleeve
Stud bolt
Pipe schedule number
Butt welding ring
Spiral winding
Stainless steel
Socket welding
Threaded end
Valve seat (plate), sealing layer
SPIRAL-W
Pipeline material grade table
4.1 Overview
The pipeline material grade table is one of the main design documents compiled by the pipeline material control specialty. It is an important basis for pipeline design, pipeline material summary, engineering construction and installation, production and maintenance. 4.2 Preparation Principles
Pipeline material grade table should generally include user name, device name, project number. The contents listed in the pipeline material grade table do not include special pipe fittings such as safety valves, electric valves, pressure reducing valves, water separators (except for steam accompanying pipes), bursting plates, flame arresters, filters, silencers, etc. provided by system professionals. 4.2.3 The scope of use of the grade number (temperature, pressure, fluid) should be indicated in the pipeline material grade table. 4.2.4 Pipeline material grade code refers to the provisions of Section 1.1 of "Chemical Plant Pipeline Material Design Engineering Regulations" (HG/T20646.2).
Pipeline material grade table refers to the provisions of Table 4.2.5
3.5 of "Chemical Plant Pipeline Material Design Engineering Regulations" (HG/T20646.2).
5 Pipe wall thickness table
5.1 Overview
Pipe wall thickness table is an important document to guide the design of professional engineering such as process system, pipeline layout and pipeline machinery. 5.2 Preparation principles
5.2.1 Pipe wall thickness table should generally include pipeline grade number, nominal diameter, outer diameter and wall thickness. 5.2.2 Pipe wall thickness is generally measured in millimeters, retaining one decimal place, or expressed by pipe table number. 5.2.3 Determine the size series of pipes according to the characteristics of the device and user requirements (such as selecting Ia, Ib series or I series specified in HG20553).
5.3 Preparation requirements
5.3.1 Pipe wall thickness table should generally classify different types of materials according to grade number (such as carbon steel, stainless steel, alloy steel and non-metallic, etc.). 5.3.2 Pipe wall thickness table should classify high pressure, medium and low pressure. 5.3.3, when there are pipes of different outer diameter series, their wall thickness tables should be compiled separately. 5.3.4 For different grades, when the pipes have the same material and the same wall thickness, they can be compiled together and explained in the notes.
5.3.5 For the format and specific contents of the pipe wall thickness table, please refer to Table 5.3.4. 10
X××x×× Engineering Company
Nominal diameter
Note: M1B and N2B are the same as N1B.
Prepare/Verify
Pipeline wall thickness table
Table 5.3. 4
Pipeline wall thickness table
Calculation and determination
Calculation and determination
Calculation and determination
Main item number
Note: For the grade codes of L1B, N1B, P1B, M1B and N2B, please refer to the provisions on grade codes of pipeline materials in HG/T20646.2-1999 “Regulations on Design Engineering of Pipeline Materials for Chemical Plants”.
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