HG/T 20645.1-1998 Chemical plant piping mechanical design content and depth regulations
Some standard content:
Chemical plant piping machinery design content
and depth regulations
HG/T20645.1--1998
Chemical plant piping machinery design documents and brief description of the composition of the design documents
Design document directory.
Pipe system flexibility analysis and stress calculation.
Reciprocating compressor inlet and outlet pipeline dynamic calculation output file Complex piping gas column natural frequency calculation output file. Air flow pulsation calculation output file.
Complex piping structure vibration calculation output file. Pipe rack table
Pipe rack material table
Summary table of steel materials.
Summary table of standard parts.
Summary table of spring support (hanger).
Expansion joint data table.
Pipe rack drawing
Standard pipe rack drawing required for engineering projects.
Non-standard pipe rack drawing.
Processing and installation instructions for pipe racks
1.2 Brief description
Design document catalog
Only the catalog of design documents to be sent to the construction site is listed, and the intermediate products used for design are not listed in the catalog. 1.2.2 Pipe rack table
Fill in the pipe rack number, pipe rack drawing number and serial number, pipe rack type, pipe rack pipeline layout drawing number, pipe section number and diameter of the supported pipeline, component serial number, elevation, quantity and related dimensional data in the pipe rack table. 1.2.3 Pipe rack material table
The pipe rack material table should be filled in by category (type). For rigid hangers and elastic hangers, statistics can be made by set. The total amount (i.e. actual usage) shall be organized and filled in by the professional person in charge. When designers prepare the pipe rack material table, only the design usage shall be filled in. Generally, the total amount shall be increased by 10% based on the design usage or implemented according to the requirements of the project contract. 1.2.4 Pipe rack drawing
The pipe rack drawing includes standard pipe rack drawings and non-standard pipe rack drawings. The standard pipe rack drawing is selected from the standard pipe rack atlas, and the non-standard pipe rack drawing is drawn by the designer. 1.2.5 Design and installation instructions for pipe racks
The processing and installation instructions for pipe racks are the guiding documents for manufacturers to manufacture pipe racks and install them on site. Pipe rack manufacturers and construction and installation companies must comply with them. 2
2.0.1 Preparation basis
2 Preparation of pipe rack table
This table is prepared based on relevant drawings and documents such as pipeline rack condition drawings, standard pipe rack drawings, non-standard pipe rack drawings, civil engineering condition drawings, equipment condition drawings, etc.
2.0.2 Content and depth of pipe rack table
1 Pipe rack number
For details on the preparation of pipe rack numbers, please refer to Chapter 15 of the "Technical Regulations for Pipeline Mechanical Design of Chemical Plants" (HG/T20645.5-1998).
2Pipe rack drawing number and type number
Fill in the pipe rack drawing number and type number in the pipe rack table. 3Parts serial number
Fill in the parts serial number of the pipe rack drawing in the pipe rack table. 4Dimensions
Fill in the dimensions A, B, C, etc. marked on the pipe rack drawing in the pipe rack table. 5Elevation
Fill in the elevation of the pipe rack in accordance with the requirements of the current national standards or enterprise standards. 6 Quantity
To help with the statistics of pipe rack materials, the quantity of each component shall be filled in. 2.0.3 For the sample table of pipe racks, see Table 2.0.3-1 and Table 2.0.3-2. 3
Proof
NAGNV'ON
NGANON
3.0.1 Basis for preparation
3. Preparation of pipe rack material table
This table is prepared based on the pipe rack table, standard pipe rack drawing, non-standard pipe rack drawing, flexibility analysis and stress calculation output table and other relevant documents and materials.
3.0.2 Content and depth of pipe rack material table
1 Summary table of standard components of pipe racks. The components summarized in the table shall be clearly filled in according to the content on the standard pipe rack drawing.
2 The model of spring hanger (support) shall be selected and filled in from the national design standard "Variable Spring Support Hanger" (GB10182-88). Or it shall be implemented according to the standard required by the contract. 3Generally, the expansion joints on pipelines can be selected from the manufacturer's samples. When statistics are collected, they should be filled in one by one according to the requirements in the expansion joint data sheet. The expansion joints on important pipelines are mostly redesigned by the manufacturer according to the conditions provided by the designer. For such expansion joints, the model can be filled in the expansion joint data sheet first. All expansion joint data are confirmed and verified by the manufacturer, and the manufacturer's data file is issued according to the contract.
4.0.1 Design basis
4 Non-standard pipe rack drawing
Draw the non-standard pipe rack drawing based on the pipeline plan layout drawing, civil engineering condition drawing, equipment condition drawing, standard pipe rack drawing and other relevant drawings and documents.
4.0.2 Design steps
1 Select the type of pipeline attachments
1) Non-detachable type (such as saddle plate, support ear, trunnion, block, lifting ear, guide plate, pipe support). 2) Detachable type (pipe clamp, pipe seat, etc.).
2 Select the rooting structure type
There are many common rooting types, see Chapter 16 of "Technical Regulations for Mechanical Design of Pipelines in Chemical Plants" (HG/T20645.5-1998), and select according to the position and state of the pipeline support. 3 Auxiliary steel structure design
The auxiliary steel structure of the pipeline support is the main component that bears and transmits the load. It is between the pipeline attachment and the rooted parts. Components such as cantilever beams and tripods are all auxiliary steel structures. 1) The material of the auxiliary steel structure is not affected by the temperature of the medium in the pipeline, but only by the ambient temperature. Except for the use of 16Mn material when the ambient temperature is lower than (or equal to) -19℃, the rest can use Q235-A. The fastener material is determined according to the environmental corrosion conditions
2) The components of the auxiliary steel structure should pay attention to the verification and control of stress and deflection. 4 Design and calculation of support structure
For relevant calculations, please refer to Chapter 11 of "Technical Regulations for Mechanical Design of Pipelines in Chemical Plants" (HG/T20645.5-1998).
5 Drawing of non-standard pipe rack
12 Drawing size
Generally, standard No. 4 or No. 3 drawings are used, without lengthening or widening. Other drawings can also be used in special cases. 2) Scale
The scale of the support drawing must comply with national standards. 3) Dimension unit
The unit is millimeter, only the number is noted, not the unit. 4) Drawing name
The drawing name in the title bar is divided into two lines, the upper line is written as "non-standard pipe rack drawing", and the lower line is written as "×× type" 5 Drawing number
Add the letter S before the standard pipe rack type code, and the 13 digits after the letter are the sequence number (such as SA001 for the first special fixed rack, SG010 for the 10th special guide rack). 6) Drawing arrangement and views
The principle is to express clearly, and non-standard pipe rack drawings shall be drawn in accordance with the drawing regulations. 8
5.0.1 Preparation basis
5 Pipe rack processing and installation instructions
This instruction is prepared based on the pipe rack table, pipe rack material table, standard pipe rack drawings and non-standard pipe rack drawings. 5.0.2 Content and depth
1 Material requirements
1) All materials used shall be spot-checked to ensure that their chemical composition, mechanical properties and dimensional deviations meet the requirements of relevant standards.
2) The materials of all standard parts and other accessories, except those specified, shall comply with the relevant standards. 2 Forming
1) Components with a blank thickness of less than or equal to 12mm and a minimum inner bending radius of greater than or equal to 12mm; and components with a blank thickness of greater than 12mm and a minimum inner bending radius of greater than or equal to 30mm can be cold formed. 2) The forming temperature and holding time of the hot-formed material should be clearly specified, and it should be cooled naturally in still air after forming.
3 Processing and Manufacturing
1) The dimensional tolerance, hole spacing deviation, and manufacturing accuracy of the general thread should be clearly specified. 2) The pipe rack type, processing size, welding, etc. should meet the design requirements. 3) After processing, an appearance inspection should be carried out, and defects such as leaking welding, insufficient welding, and cracks are not allowed. 4) Qualified supports and hangers should be rust-proofed and anti-corrosion treated, and coded and marked according to design requirements and properly kept.
4 Welding
1) All welds are continuous welds, and the height of the fillet weld is the thickness of the thinner weldment, and shall not be less than 6mm. 2) For carbon content greater than 0.3% or carbon steel weldments with weld thickness greater than 25mm, and chrome-molybdenum steel weldments with weld thickness greater than 10mm should be preheated before welding. 3) For the thickness of butt welds or the height of fillet welds, if the thickness of carbon steel is greater than 20mm and the height of chrome-molybdenum steel is greater than 12mm, post-weld stress relief heat treatment should be performed. When cooling, the temperature should be slowly reduced in a furnace or in still air. 5 Installation
1) For pipes without thermal displacement, the hanger should be installed vertically; for pipes with thermal displacement, the hanger should be installed at an angle of half the displacement value in the opposite direction of the displacement.
2) For the sliding surface of the guide bracket, the installation position should be offset from the center of the support surface to the opposite direction of the displacement, and the offset value should be half of the displacement value.
3) The installation height of the spring support (hanger) bracket shall be adjusted by the manufacturer and cannot be changed at will during installation. The spring locating pin shall not be removed until the system is installed, pressure tested, and thermally insulated. 4) Temporary support (hanging) brackets should be clearly marked and should be removed after the pipeline is installed. 5) The installation of expansion joints should be carried out in accordance with the manufacturer's installation guide. 6 Surface treatment and anti-corrosion
1) After all pipe racks are subjected to surface treatment such as decontamination and rust removal, they should be painted with primer twice and topcoat twice. The color of the topcoat is generally medium gray, or as required by the contract. 2) After the installation of the pipe rack connectors, decontamination, rust removal and anti-corrosion treatment should also be carried out. 7 High-strength bolts for connection
1) The technical conditions of high-strength bolts, nuts and washers for connection should comply with the provisions of the current national "Technical Conditions for High-strength Large Hexagon Head Bolts, Large Hexagon Nuts and Washers for Steel Structures" (GB/T1231). 2) Before installation, the surface rust should be removed with a wire brush or a portable grinding wheel, and the cleaned surface should be kept clean. 8 Packaging, transportation and storage
1) The threads of threaded parts should be coated with anti-rust oil (butter or acid-free industrial vaseline), and necessary protective measures should be taken to avoid damage to the threads during transportation.
2) Pipe racks and supporting parts should be numbered according to the requirements of the design documents to facilitate installation. 3) The packaging of pipe racks should take into account that they will not be affected by moisture, rust or other damage during transportation and storage. 10
Chemical plant piping mechanical design content and depth regulations HG/T20645.1-1998bzxZ.net
Article explanation
1 Composition and brief description of chemical plant piping mechanical design documents 1.1.2 The results of the flexibility analysis and stress calculation of the piping system should include the feedback of the verification of the forces and moments on the equipment or machine interface, the positioning of the sliding support of the horizontal container, and the feedback of the special strength verification calculation required on the piping system.
1.1.5 The pipe rack material list should often also include other required auxiliary materials, such as anti-corrosion coatings, expansion bolts, vibration-damping elastic materials, etc.
2 Preparation of pipe rack list
2.0.2 The preparation of pipe rack numbers should be carried out according to the project or single project (with a separate file number) to make them unique, so as to avoid duplication or omission of items and facilitate identification. 3 Preparation of pipe rack material list
3.0.2 When installing expansion joints on the pipe system according to the engineering design requirements and submitting the design conditions and requirements to the manufacturer, the pressure level data required for installation and operation should be comprehensively considered so that the documents and data provided by the manufacturer can meet the design requirements.
5 Processing and installation instructions for pipe racks
5.0.2 Content and depth
3 The processing and production of pipe racks should be in accordance with the requirements of the nature of the project contract, and it should be clear whether it is an integral production, a semi-finished product prefabrication, or on-site processing with materials provided.
5 The installation site should be constructed according to reasonable procedures, and temporary supports (hanging frames) should be used as little as possible to reduce damage to equipment and pipelines.
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