HG/T 20519.3-1992 Design Description (including process, piping, insulation, sound insulation and anti-corrosion design description) HG/T20519.3-1992 standard download decompression password: www.bzxz.net

Design description
HG 20519.3-92
Design description
HG 20519.3-92
The design description of the construction drawing of chemical process design consists of the process design, piping design, insulation, sound insulation and anti-corrosion design description. Process design description
The process design description of the construction drawing of chemical process design should include the following contents: 1.0.1 Design basis
The design basis is to explain the task source and design requirements of the construction drawing design. It includes the following parts: the commission, task book, contract, agreement and other relevant documents of the construction drawing design; the approval documents and modification documents of the preliminary design; other relevant design basis.
1.0.2 Process description
1.0.2.1 Description of the chemical process modification and supplement made based on the preliminary design approval documents and modification documents. 1.0.2.2 Process description of the improvement and adjustment of the preliminary design in the construction drawing design. 1.0.2.3 Construction instructions related to the process and the principle of starting and stopping the device. 1.0.3 Design scope
1.0.3.1 The scope of design, such as: the design scope of cooperative design or export projects should be explained. The composition of the device design and the name and code of the unit or project. 1. 0. 3. 2
2 Pipeline design instructions
The pipeline design instructions of the chemical process design construction drawing are composed of the following parts: 2.0.1 Zoning:
2.0.1.1 The number of each zone;
2.0.1.2 The drawing number of the zone index;
2.0.1.3 The corresponding relationship between the zone number and the pipeline layout drawing number. 2.0.2 Relevant standards for the representation of pipeline diagrams:
2.0.2.1 Legend symbols;
2.0.2.2 Abbreviations;
2.0.2.3 Others.
2.0.3 Material supply situation:
2.0.3.1 If it is a No. 1 device, the scope of material supply of both parties should be stated; 2.0.3.2 Division of domestic and foreign procurement:
2.0.3.3 The standard of pipes shall adopt international standard series pipes (HGJ35-90I series pipes), or adopt the used series pipes (HGI35-90 straight series pipes); 2.0.3.4 Technical document number of material supply within the unit design scope; 2.0.3.5 Special requirements for material supply.
2.0.4 Precautions for equipment installation:
2.0.4.1 Issues that need to be explained when hoisting large equipment, such as hoisting sequence and requirements, etc.; 2.0.4.2 Special installation requirements for equipment entering a large room or frame, such as removable beams, holes in the wall, etc.; equipment accessories, sliding plates, spring seats, pads for cold-keeping equipment, etc.: 2.0.4.3
Equipment brackets, which equipment positions have brackets, and what are the installation technical requirements. 2.0.4.4bzxz.net
2.0.5 Requirements for pipeline prefabrication and installation:
Standard number, pipeline grade and classification of pipeline construction specifications: 2.0.5.1
2.0.5.2 Additional requirements for pipeline welding, such as preheating, post-weld heat treatment, stress relief, welding grade, welding requirements and specifications for different steel grades, etc.;
2.0.5.3 Special requirements for pipeline installation, such as cold tightening, thread sealing welding, thread sealing tape, temporary gaskets and other relevant precautions;
2.0.5.4 Installation of heating system
(1) Relevant regulations and standard numbers:
(2) Measures to prevent overheating of material pipes and material pipe section numbers. 2..5.5 Installation requirements for special parts, such as expansion joints, temporary filters, bird-proof nets, etc.; 2.0.5.6 Pressure test requirements:
2.0.5.7 Requirements for buried pipelines;
2.0.5.8 Requirements for installation of non-metallic pipelines.
2.0.6 Pipe racks:
Adopted pipe rack standards;
2. 0. 6. 11
2.0.6.2 Factory prefabricated parts;
2.0.6.3 Precautions for installation of small pipe racks. 2.0.7 Electrostatic grounding:
2.0.7.1 Standard drawings adopted for pipeline electrostatic grounding; 2.0.7.2 Which equipment needs electrostatic grounding. 2.0.8 Adopted national and ministerial standards
List the standard name and standard number, and explain that the standards should be prepared by the construction unit. 8
3.0.1 Selected thermal insulation materials
3 Thermal insulation and sound insulation design description
3.0.1.1 Name and performance of main thermal insulation materials
Including: thermal conductivity equation:
Composition and impurity requirements:
Main components and slag ball content;
Chlorine content;
Mechanical strength:
Bulk density,
Using temperature range;
Water absorption;
Fire resistance;
Related standard names and numbers.
3.0.1.2 Outer protective layer
Including: name, material, thickness.
3.0.1.3 Scope of use of cotton felt and pipe shell, etc. 3.0.1.4 Sound insulation materials.
3.0.2 Insulation levels encountered in the project, such as specific requirements for heat insulation, anti-scalding, cold insulation, etc. 3.0.3 Insulation and sound insulation structures and standards used. Construction requirements
Include: See ××× specifications;
Pay attention to rain protection requirements during construction;
Whether the cold insulation layer is foamed on site;
Special requirements for sound insulation structures;
Insulation requirements for valves;
Others.
4 Anti-corrosion design instructions
4.0.1 Scope of painting
4.0.1.1 This regulation refers to the external painting of equipment and pipelines; 4.0.1.2 Material categories of equipment and pipelines that need to be painted; 4.0.1.3 Material categories of equipment and pipelines that do not need to be painted, 4.0.1.4 The painting of rotating equipment should be completed in the manufacturer; 9
4.0.1.5 Others.
4.0.2 Name of the paint used (primer and topcoat). 4.0.3 Construction requirements
4.0.3.1 Matching of primer and topcoat;
4.0.3.2 Surface cleaning before painting:
4.0.3.3 Number of layers of paint
4.0.3.4 Construction specification standard number.
4.0.4 Color of paint
Based on the standard push number and other supplementary documents. 4.0.5 External corrosion protection of buried pipelines.
Internal corrosion protection of pipelines.
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