HG/T 20579.2-1999 Quality acceptance standard for process equipment piping models (with clause explanation)
Some standard content:
Industry Standard of the People's Republic of China
Quality Inspection Standard of Piping Models for Process Plant
HG/T 20579.2-1999
Editor: National Chemical Engineering Model Design and Design Tool Technology Center Approval Department: State Administration of Petroleum and Chemical Industry Implementation Date: April 1, 2000 National Chemical Engineering Standard Editing Center (formerly the Engineering Construction Standard Editing Center of the Ministry of Chemical Industry) 2000
"Quality Inspection Standard of Piping Models for Process Plant" (HG/T20579.2-1999) is a chemical industry design standard approved and promulgated by the State Administration of Petroleum and Chemical Industry. The content of this standard includes: general principles, model component manufacturing quality, acceptance standards and clauses of finished models, etc.
This regulation is managed by the National Chemical Engineering Model Design and Design Tool Technology Center. If any problems are found during the implementation of this regulation, please send your opinions and relevant information to the 11th Floor, Yongxing Business Building, No. 22, Lane 376, Yan'an West Road, Shanghai, National Chemical Model Design and Design Tool Technology Center, Postal Code 200040, for reference when making revisions. This standard is edited by the National Chemical Model Design and Design Tool Technology Center and approved by the station's technical committee.
Main compilers of this standard: Gu Guoliang, Jiang Lianbao, Shi Yongtang, Zhang De1 General Principles
The design of process equipment piping models is an integral part of the entire engineering design process. In order to ensure the quality of model design, this standard is specially formulated. 1.0.2 The main contents of the quality acceptance standard for process equipment piping models are divided into two parts, namely the quality of model component production and the quality acceptance standard for model finished products. 1.0.3 This standard applies to the quality acceptance of process equipment piping models in the engineering design process of chemical, petrochemical, pharmaceutical and other industries.
Model component manufacturing quality
2.1 Model chassis
2.1.1 Panel of the model chassis: The surface should be flat and smooth, and the four sides should be perpendicular to the table.
2.1.2 The outer dimensions of each model chassis, the allowable deviation of each side length is ±1mm, and the length tolerance of the two diagonals of the chassis panel is 1.5%. 2.1.3 For the model chassis with detachable feet, the installation of the feet must be firm, stable, and vertical, and the allowable deviation of the height of the feet is ±1mm. 2.1.4 The axis coordinate grid should be accurately indicated on the chassis table. The longitudinal and transverse lines of the coordinate grid should be perpendicular to each other, and the allowable deviation of the distance between two parallel lines is ±0.5mm. 2.2 Factory Building and Frame
2.2.1 The outer dimensions of the factory building columns shall be controlled. The allowable deviation of the cross-sectional dimensions of each column is ±1mm, and the allowable deviation of the height of the column is 0.5mm. The four sides of the column shall be straight and smooth and perpendicular to the end face.
2.2.2 The height of the main beam of the factory building shall be controlled. The allowable deviation is ±1mm. The outer dimensions shall be smooth and the end faces shall be flat and vertical.
2.2.3 The transparent organic glass with a thickness of 4~5mm shall be used for the production of the factory building floor slab. The axis coordinate grid on the floor slab shall be consistent with the standard grid on the chassis; the position of the opening on the floor slab shall be based on the center line of the hole, and the allowable deviation is ±1mm. 2.2.4 The beams and columns of the steel frame structure shall be made of 34
profiles of the standard series model components, and the allowable deviation of the outer dimensions is ±1.5mm; during production, its technical requirements shall be consistent with the requirements for the production of factory building beams and columns. 2.2.5 The technical requirements for the production of reinforced concrete frame structures, beams, columns and other model parts should be consistent with the production of beams and columns of the plant model. 2.3 Equipment and pumps
2.3.1 The production of various equipment models should simplify their appearance according to the requirements of appearance visualization. During the production process, the external dimensions, assembly positions of pipes and main accessories, and installation forms should be controlled.
2.3.2 Control of equipment appearance
Cylindrical chemical equipment such as towers, reactors, and storage tanks can be assembled by comparing with standard series model components. When the diameter of the equipment is less than 50rmm, the allowable deviation of the diameter is ±2mm. When the diameter of the equipment is greater than 50mm, the allowable deviation of the diameter is ±5mm. The allowable deviation of the height or length of the equipment is ±2mm.
For non-cylindrical equipment, the main external features of the equipment should be indicated during production, and its external dimensions should be controlled. The allowable deviation of the external dimensions of general equipment is ±2mm. The allowable deviation of the overall dimensions of large equipment is 5 mm.
2.3.3 Assembly of equipment pipes and accessories
The assembly of pipes on equipment must strictly control their size and orientation, and the allowable deviation of the size of the pipe installation center point is 1 mm.
2.3.4 Installation of equipment
The installation form of model equipment should meet the design requirements, and the production of various installation brackets should meet the dimensions marked on the equipment layout drawing. 2.3.5 Production of pumps
The production of pumps can be simplified, but the position of the pump head, pump body, and motor must be vividly displayed. The allowable deviation of the main overall dimensions of the pump is 2 mm, and the allowable deviation of the overall dimensions of large units is 5 mm. 35
The inlet and outlet pipes of the pump should be assembled accurately, and the allowable deviation of the center position should be tImmg
2.4 Pipeline configuration and installation
2.4.I The pipeline configuration on the model should be assembled according to the determined proportion, and the corresponding specifications of the pipes, pipe fittings, valves and support and hanger components in the standard series model components should be selected to ensure the installation position required by the pipeline design drawing in the device. 2.4.2 The pipeline configuration on the model should include process material pipelines and more than 2\ auxiliary material pipelines.
2.4.3 The pipe diameter size of the pipeline configuration on the model should be selected according to the classification of the model pipeline ratio conversion comparison table, and the actual pipe diameter size should be marked with pipeline labels. 2.4.4 The setting of the pipe support and hanger on the model only considers the needs of model piping assembly. The model pipeline should be color-coded according to the classification of process materials or pipeline materials (selected according to the color comparison of the standard series model components), and clearly marked on the model legend. 2.4.6 The model pipeline must accurately indicate the installation positions of various valves and pipe fittings that need to be indicated.
2.4.7 After the model pipeline is configured, the pipeline number, diameter, material code and flow direction should be prominently marked with labels according to the requirements of the "Process Equipment Model Design Regulations". 2.4.8 The model should also clearly indicate the distribution positions of the bridges of the main instrument cables and electrical cables in the device according to the design requirements.
The fans and main air ducts of the ventilation system in the device should be clearly indicated according to the design requirements. 2.4.91
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Acceptance standards for finished models
3.1 Quality acceptance of finished models
3.1.1 The quality acceptance of finished models is to test the overall assembly quality level after the various model components are combined. The inspection is mainly carried out from the overall assembly of the chassis, civil engineering workshop, frame and pipe gallery, equipment and installation, pipeline configuration, and the overall effect of the model. 3.2 Overall assembly of chassiswww.bzxz.net
3.2.1 After the overall assembly of the model chassis, the table height is consistent, there is no obvious gap between the blocks, the appearance is smooth and neat, the detachable support feet of the chassis are firmly assembled, the total assembly size of the model chassis and the design size are within the allowable deviation of ±3% to 5%, and the overall coordinate network is accurate.
3.3 Civil workshop, frame and pipe gallery
The allowable deviation of the plane coordinate position of the beam, column and floor slab of the workshop is ±0.5mm, and the column, beam and floor slab should be kept vertical. 3.3.2 After the assembly of the workshop, the allowable deviation of the floor height of each floor is ±1mm, and the allowable deviation of the cumulative height of the multi-story workshop after assembly is ±2mm3.3.3 The necessary hoisting reserved holes, elevator shafts and stairwells in the workshop should be clearly indicated and accurately located.
3.3.4 The overall assembly and bonding of the plant should be firm, and the column grid axis number and floor elevation should be clearly marked. 37
3.3.5 The frame-type structures in the device should show the structural characteristics after assembly. The main dimensions of the frame such as floor height and span should be consistent with the model making requirements of the civil engineering plant. 3.3.6 The span and floor height of the pipe corridor in the device area should be controlled, and the allowable deviation of the external dimensions is ±2mm. The overall assembly of the pipe corridor should be firmly bonded, and there should be no obvious position difference at the joints of the model blocks.
3.4 Equipment and installation
3.4.1 According to the requirements of the equipment layout drawing, the number of equipment in the device should be complete, the installation position of the model equipment should be consistent with the design requirements, the positioning should be accurate, and the assembly should be firm. 3.4.2 Each equipment should be marked with the equipment classification code and equipment number. 3.4.3 The basic size of the equipment, the installation form, the pipe mouth and the installation orientation of the main accessories should meet the design requirements.
3.5 Model Pipeline Configuration
The pipeline configuration has no omissions or errors, the pipe diameter selection meets the model proportion requirements, and the pipeline color meets the pipeline color separation principle.
3.5.2 The valve installation position on the pipeline is accurate, and the valve category is clearly indicated. 3.5.3
The pipeline is firmly installed, and the main pipeline is clearly labeled. 3.6 Overall effect of the model
3.6.1 After the overall assembly of the model, the plant, frame, pipe gallery, equipment installation, and pipeline in the device area are assembled into a whole, and there is no obvious misalignment of each layer or block surface. 3.6.2 The finished model should indicate the device name, model proportion and piping legend. 38
:com Quality Acceptance Standard for Process Device Pipeline Model HG/T 20579.2-1999
Article Explanation
1.0.1~1.0.3 This standard applies to the quality acceptance of process device pipeline models in the chemical, petrochemical, pharmaceutical and other industries.
2.1~2.4 Quality control in the model component production stage is an important part of the quality control of process equipment pipeline models. The allowable deviation values listed in the quality acceptance standards for various components are determined based on the practical experience of model design and production in the chemical industry system for many years, taking into account the difference of the existing standard series model components and the visual allowable deviation when the model design is adopted according to the engineering project, so that the processing quality of each model component is consistent with the overall quality requirements of the model design. 2.1.2 The allowable deviation values listed in this standard are non-metallic non-matching standards and cannot be equated with the "tolerance and matching" standard (the allowable deviation values listed in the following clauses are the same as the description of this clause). 3.1.1 The content of the quality acceptance of the finished model mainly considers the overall quality effect of the model after assembly, such as the plant frame, equipment installation, and pipeline configuration. The key is to implement a system in which the previous process is responsible for the next process in terms of installation orientation, size, verticality, bonding strength, etc. of the completed model components during the assembly process to ensure that the finished model meets the quality standards required by the engineering design.
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