HG/T 20701.9-2000 Specification for the design of professional engineering for vessels, heat exchangers and special equipment. HG/T20701.9-2000 Standard download decompression password: www.bzxz.net

Instructions for the preparation of professional engineering design regulations for containers, heat exchangers and special equipment HG/T 20701.9-2000
Subject content and scope of application
This standard specifies the purpose, content and writing requirements for the preparation of professional engineering design regulations for containers, heat exchangers and special equipment, and is applicable to design technical management and quality management. 2 Types of design regulations
Design regulations include general design regulations and engineering design regulations. 2.0.1 General design regulations are general design technical regulations compiled by the design unit, usually compiled according to the profession or equipment category, and applicable to general engineering. 2.0.2 Engineering design regulations are design technical regulations that are mainly compiled by the leading design profession and other professions (such as materials profession, etc.) and are applicable to a specific engineering project. The usual practice is that the professional person in charge of a certain profession is responsible for the compilation, and other professions (such as materials profession, etc.) participate in the compilation or review of relevant chapters. 3 Purpose and method of engineering design regulations 3.0.1 The engineering design regulations for containers, heat exchangers and special equipment are compiled according to the various requirements that must be followed in the design of the project contract and engineering design. It is a relatively complete general regulation on equipment design. The purpose of its compilation is: on the one hand, it tells the user what regulations and requirements the equipment of this project will be designed in accordance with; on the other hand, it requires designers to carry out design work in accordance with the unified requirements of the regulations; to achieve the purpose of improving design efficiency and design quality.
3.0.2 The engineering design regulations are limited to use between the design unit and the user. Before they are officially published, the user's consent must be obtained (when necessary). Once published, they must be strictly followed in the entire engineering design. 3.0.3 The engineering design regulations are generally modified and compiled based on the general design regulations and the actual situation and requirements of the project, with reference to the design regulations of a similar project in the past. When the content of the general design regulations is completely applicable to a certain project, it is not necessary to re-compile it, and only the general design regulations need to be submitted to the user and relevant designers. 3.0.4 The engineering design regulations are a design document with guiding functions, which are required to be completed in the early stage of the engineering design stage. The usual practice is that in the preliminary design stage, the person in charge of the equipment specialty first writes a preliminary engineering design regulation, and after the engineering design begins, it is formally written according to the actual situation of the project and the specific requirements of the user. 4 Contents of the design regulations
Although the conditions of various types of equipment are different, the basic contents of the equipment design regulations are similar, generally including six parts: general principles, design, materials, manufacturing, heat treatment, and inspection. 4.1 General provisions
4.1.1 Scope: Describe the requirements for the design, materials, manufacturing, inspection and testing of a certain type of equipment; clarify the names and versions of the specifications and standards used in the engineering design.
4.1.2 Modification: Clarify the procedures and methods for modifying and supplementing this regulation. 4.2 Design
Overview and clarify the basis for the design or selection of a certain type of equipment. Basic allowable stress describes the principles for selecting basic allowable stress. Design pressure describes the definition, selection basis and determination principle of design pressure. Design temperature describes the general principles for determining design temperature. If necessary, the principles for determining the design temperature of certain equipment or certain local areas should also be explained.
Design loads describe the various static loads and external loads that should be considered in the design, and if necessary, the dynamic loads that should be considered. Corrosion and corrosion protection describe the value of corrosion allowance and the provisions for the minimum lining or cladding thickness. Shell (tube box) and head specify the shell (tube box) diameter series, minimum thickness and head type and standard. Tube bundle and tube For shell and tube heat exchangers, the standards, accuracy grades or dimensional tolerances of the tubes, the selection regulations of welded tubes, the arrangement of tubes, the connection form of tubes and tube sheets, etc. 90
Supports describe the requirements and selection standards for equipment support types. 4.2.10
Flanges, bolts and gaskets describe the provisions for the use of flanges, bolts and gaskets. 4.2.11
Container pipe flanges Describe the regulations for pipe extension length, pipe wall thickness, small diameter pipe reinforcement, opening reinforcement, etc. Manholes, hand holes and inspection holes Describe the regulations for the location and number of installation. Internal parts Describe the minimum wall thickness of internal pipes and the design requirements for internal parts such as tower plates. 4.3 Materials
Overview Describe the source and basis for equipment material selection. Bolts and gaskets Describe the regulations for materials. Materials
Manufacturing and heat treatmentwww.bzxz.net
Overview Describe the specifications and standards followed by equipment manufacturing and heat treatment. 4.4.1
Supplementary content and special requirements.
Inspection and testing
4.5.1Overview Describe the specifications and standards followed by equipment inspection and testing. 4.5.2
Supplementary regulations and requirements.
5 Preparation Instructions
5.0.1 The requirements for design regulations in this standard are for general equipment. For special equipment (e.g., various types of heat exchangers, various storage tanks, special equipment, etc.), certain aspects may be added or deleted as appropriate based on the characteristics and requirements of the equipment.
5.0.2 When the equipment design adopts domestic standards and specifications and is a domestic project, the specific regulations in the engineering design regulations can directly quote the names and numbers of domestic specifications and standards (e.g., "Container Regulations", GB, HG standards), without having to enter the detailed contents of the regulations. When the equipment design adopts international standards and is an overseas project, the engineering design regulations should enter the detailed contents of the specific regulations in detail.
5.0.3 The general design regulations for containers, heat exchangers and special equipment should be compiled separately for each type of equipment, and the regulations should be complete and accurate as much as possible to improve the quality of engineering design and work efficiency. 91
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