HG/T 20645.4-1998 Design conditions proposed by chemical plant piping machinery HG/T20645.4-1998 standard download decompression password: www.bzxz.net

Design conditions proposed by the pipeline machinery major of chemical plants
HG/T20645.4-1998
Pipe system flexibility analysis (critical piping system) table
1.1 Scope and purpose
This regulation applies to the preparation of the piping flexibility analysis and stress calculation (critical piping system) table in chemical plants. 1.1.1
1.1.2 This condition serves as the basis for the pipeline layout major to draw the axonometric drawing of the piping flexibility analysis and stress calculation. 1.2 Data and conditions based on
Data based on
Engineering (or design) commencement report;
Engineering design basic data (see the attachment of the commencement report). Based on the conditions
"PID\flow chart" compiled by the process system professional; "Pipeline naming table" compiled by the process system professional; "Pipeline material control professional engineering design regulations" compiled by the pipeline material control professional 1.3
Compilation conditions and content depth
The pipe system flexibility analysis and stress calculation (critical pipe system) table consists of the following three parts. Pipe systems that must be calculated by computer
1 Pipes connected to the inlet and outlet of the turbine,
2 Pipes connected to the inlet and outlet of the centrifugal compressor. 3 Pipes connected to the inlet and outlet of the reciprocating compressor. 1.3.2 Pipe systems that should generally be calculated
1 Pump inlet and outlet connecting pipes.
1) The nominal pipe diameter is equal to or greater than 100mm, and the temperature is equal to or higher than 23 0℃, or pipes equal to or lower than -20℃.
2) Pipes with a larger diameter than the pump interface (referring to a reducing connection). 57
2 Pipes required by relevant specifications
1) Pipes that are required to undergo flexibility analysis as specified in the boiler specifications. 2) Pipes that are required to undergo flexibility analysis as specified in the specifications. 3 Pipes connected to air coolers
1) Pipes with connecting pipe ports with a nominal diameter equal to or greater than 150mm. 2) Pipes with connecting pipe ports with a temperature equal to or higher than 120℃. 4 Pipes connected to furnaces
1) Pipes with connecting pipe ports with a nominal diameter equal to or greater than 150mm. 2) Pipes with connecting pipe ports with a temperature equal to or higher than 230℃. 5 Other pipes
1) All pipes with a temperature equal to or higher than 340℃ 1) Pipes. 2) All low-temperature pipelines connected to the cold box. 3) Pipes with a nominal diameter equal to or greater than 150 mm and a temperature equal to or higher than 230°C or equal to or lower than -20°C.
4) Important pipelines connected to pressure vessels. 5) All important pipelines and internally insulated pipelines proposed by process professionals. 6) Pipes on the pipe gallery with a nominal diameter equal to or greater than 150 mm. 7) All aluminum and aluminum alloy pipes.
8) All lined pipes.
For pipelines outside the above scope, it should be determined whether stress calculations should be performed based on the specific circumstances of the project. 2 Condition table for pipeline wall thickness calculation results
2.1 Scope and purpose
2.1.1 This regulation applies to the conditional compilation of pipeline wall thickness calculation results in chemical plants. 2.1.2 This condition is used as the basis for the final determination of the pipe wall thickness by the pipeline material control profession. 2.2 Data and conditions based on
Data based on
Project (or design) commencement report.
2 Basic data for engineering design,
Conditions based on
Pipeline instrument flow chart (PID).
Pipeline naming table.
2.3 Conditions and content depth of preparation
This condition table lists all the data required for pipe wall thickness calculation in the chemical plant. 59
3 List of pipe system flexibility analysis and stress calculation 3.1
Scope and purpose
3.1.1 This regulation applies to the preparation of pipeline flexibility analysis and stress calculation results in chemical plants. 3.1.2 This condition is used as one of the bases for the pipeline professional to design the pipeline plan layout 3.2 Data and conditions based on
Data based on
Project (or design) commencement report.
Basic data for engineering design.
Equipment drawings of manufacturers and equipment professionals. 3
Standards and specifications required for calculation.
Based conditions
Axonometric sketch for stress calculation.
Pipeline plan layout.
Pipeline instrument flow chart and pipeline naming table. Pipeline material classification table, pipeline material classification index, pipeline material regulations and valve and pipe fitting condition table. Civil structure template drawing, steel platform structure drawing and building plan, elevation and section drawings. Safety valve reaction force data table.
Regulating valve reaction force data table.
Equipment drawing.
Preparation conditions and content depth
Pipeline flexibility analysis and stress calculation list includes: 3.3.1 Pipeline and pipe fittings performance data;
3.3.2 Design temperature, pressure, linear expansion coefficient, elastic modulus;60
3.3.3 Force and moment acting on the constraint point;3.3.4 Deflection or initial displacement acting on the constraint point;3.3.5
Branch maximum stress and allowable stress range;3.3.6
Spring model, load, displacement, rotation angle, quantity and installation height; Dynamic (impact force, wind, earthquake) influence data. 61
Compressor inlet and outlet pipeline dynamic calculation output results 4
4.1. Scope and purpose
4.1.1 This regulation applies to the preparation of compressor inlet and outlet pipeline dynamic calculation analysis in chemical plants. 4.1.2 This condition serves as the basis for pipeline layout professionals to design pipeline plan layout drawings and manufacturers to provide pipe fittings and ancillary equipment.
4.2 Data and conditions to be relied upon
4.2.1 Data to be relied upon
1 Regulations and standards related to the design;
2 Equipment drawings and data provided by the manufacturer. 4.2.2 Conditions to be relied upon
1 Mechanical performance data of the compressor provided by the manufacturer (or pump specialist) (such as cylinder lag angle, cylinder relative clearance volume, etc.).
2 Gas medium parameters in the pipeline provided by the process specialist (including adiabatic index, compressibility coefficient, gas expansion index, gas constant, medium density, medium sound velocity, etc.). 3 Pipeline plan layout and axonometric drawing for dynamic calculation. 4.3 Conditions and content depth to be compiled
The content of the dynamic calculation and output table includes:
4.3.1 Output table for calculation of natural frequency of gas column of complex piping system 1 Verification output of input file data.
2 Natural frequency of each order of gas column at each branch node. 3 Calculate the natural frequency range of gas column at the highest speed. 4.3.2 Output table of air flow pulsation calculation
1 Verification output of input file data.
Pulsation value at each branch pipe section node under each speed condition. 2
Calculate the pulsation value of each branch node at the highest speed and draw a pulsation value curve. 3
Output table of pipe system structure vibration calculation
Verification output of input file data.
The lowest natural frequency values.
The vibration mode value of each node in each degree of freedom direction. The vibration displacement value of each node in each degree of freedom direction. 4
5 Dynamic stress value at the specified node on the pipe system
1) Maximum normal stress.
2) Maximum shear stress t.
3) Composite stress α calculated according to the fourth strength theory. 63
5 Pipeline branch reinforcement calculation
Scope and purpose
5.1.1 This regulation applies to the preparation of pipeline branch reinforcement calculation in chemical plants. 5.1.2 This condition serves as the basis for strength verification of branch connection and on-site reinforcement construction. 5.2 Data and conditions based on
Data based on
Chemical pipeline design specification (HGJ8).
5.2.2 Conditions based on
1 Branch connection structure diagram (detailed drawing).
2 Pipeline nomenclature table.
Pipeline flexibility analysis and stress calculation (unverified) axonometric drawing. 5.3 Preparation conditions and content depth
The output table of branch pipe reinforcement calculation includes: 5.3.1 The reinforcement area A1 required for opening reinforcement when only under pressure is considered. 5.3.2 The effective reinforcement area A2 formed by the extra thick part of the effective thickness of the main pipe wall in the reinforcement area.
5.3.3 The effective reinforcement area A3 formed by the extra thick part of the effective thickness of the branch pipe wall in the reinforcement area.
The effective reinforcement area A4 composed of weld metal and other reinforcement metals close to the main pipe or branch pipe in the specified reinforcement area.
5.3.5 Determine whether additional reinforcement is required for the pipe branch connection. When A+A+A≥A
, it means no reinforcement is required
End flange verification calculation
6.1 Scope and purpose
6.1.1 This regulation applies to the preparation of end flange verification calculations in chemical plants. 6.1.2 This condition is used as one of the bases for the professional design of pipeline layout and professional equipment design. Data and conditions based on bZxz.net
Data based on
Chemical pipeline design specifications (HGJ8).
Steel pressure vessels (GB150).
Based on
Pipeline instrument flow chart and pipeline naming table. Pipeline material control professional engineering design regulations, pipeline material regulations, pipeline material classification table. 2
6.3 Depth of conditions and content compiled
The output table of end flange verification calculation includes: 6.3.1
Original data required for calculation.
Equivalent pressure of flange.
The actual pressure that flange can withstand.
List the verification results and treatment opinions or suggestions. 6.3.4
Determination of the position of the sliding support of the horizontal container
Scope and purpose
7.1.1This regulation applies to the preparation of the position conditions of the sliding support of the horizontal container in the chemical plant. 7.1.2This condition serves as the basis for the professional design of the sliding support of the horizontal container by the equipment. 7.2Based data and conditions
Based data
1 "Steel Pressure Vessel" (GB150).
7.2.2Based conditions
General drawing of horizontal container equipment.
2Pipeline layout diagram.
3Flexibility analysis and stress calculation output results of critical piping systems connected to horizontal containers. 7.3Prepared conditions and content depth
The content of the horizontal container sliding support position table includes: 7.3.1Equipment position number.
7.3.2The position of the sliding support end.
Pipe rack foundation conditions
8.1 Scope and purpose
8.1.1 These regulations apply to the preparation of pipe rack foundation conditions in chemical plants. 8.1.2 These conditions serve as the basis for the design of pipe rack foundation by civil engineering professionals. 8.2 Data and conditions to be based on
Data to be based on
Regulations for engineering design of civil engineering professionals.
Conditions to be based on
Pipeline layout diagram (with pipe rack marks on the diagram). Civil engineering structure template diagram.
8.3 Depth of conditions and contents to be prepared
Contents of pipe rack foundation conditions include:
Geometric dimensions (size) of the foundation.
8.3.2 Loads borne by the foundation (magnitude and direction of forces and moments). Location and elevation of the foundation.
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