HG/T 20519.40-1992 Gasket seal code HG/T20519.40-1992 Standard download decompression password: www.bzxz.net

Gasket sealing code
HG 20519. 40-92
Gasket sealing code
HG20519.40-92
Gasket sealing code is used in the gasket column in the appendix of the pipeline axonometric drawing, and is also used in the gasket column in the pipe section table, as shown in the following table Gasket sealing codebzxZ.net
FLAT FACE
RAISED FACE
MALE＆FEMALE
TONGUE&GROOYE
1UNION
Full plane, full plane
Raised surface (i.e. smooth surface)
Convex and concave surface
Grooved surface
Sealing surface of pipeline joint
For annular metal gaskets such as elliptical and octagonal lenses, the sealing code may not be indicated. 210
Unified Provisions on the Content and Depth of Chemical Process Design and Construction Drawings HG -20519. 1~40-92
Preparation Instructions
1. This standard is prepared according to the item "90-4\Unified Provisions on the Content and Depth of Chemical Process Design and Construction Drawings" issued by the Infrastructure Department of the Ministry of Chemical Industry (91) Chemical Basic Standard No. 21. 2. This standard is mainly based on the fact that most design units, including the provincial chemical design institute, still have integrated process systems and pipelines. Therefore, the content includes all process construction drawings including process flow, design instructions, layout, piping and various table formats.
3. This standard is based on the Chemical Process Construction Drawing Design Regulations (CD41A1A7, CD42A1~A16) issued in 1982, and has been supplemented and revised in large quantities. Its content depth meets both modern The needs of chemical engineering construction have also been approached to the practices of foreign engineering companies.
4. In consideration of the customary practices of domestic design units, the coding method of equipment position numbers remains unchanged according to the original CD standard. 5. Regarding the equipment, machine and pipeline legends, we have considered both achieving consistency with international ISO standards as much as possible and taking into account domestic customary practices, so a small number of modifications have been made to the original CD standard. 6. In this standard, HG20519.1~26 are design regulations for construction drawings, which must be sent to the construction department and Party A. The design regulations of HG20519.27~40 can be sent to the construction department and Party A as needed. 7. The homepage drawing is included according to the common practices of foreign engineering companies. This is completely inconsistent with the original homepage drawing. The original homepage drawing shows the device The position on the general drawing, as well as the specific position and elevation of the pipelines and cables entering and exiting the device. The content of the first page of this regulation is a summary of the legends, symbols, equipment position numbers, material codes and pipeline numbers used in the pipeline and instrument flow chart, excluding equipment drawings. 8. Due to the current trend of large-scale chemical plants, the pipeline plan layout cannot be drawn on one drawing according to the selected scale and needs to be divided into zones. In order to understand the zoning situation, this standard specifies the requirements for drawing zoning index maps. 9. The equipment bolt inspection table is mainly for counting materials so that the anchor bolts are not missed. Therefore, it is stipulated that all anchor bolts that have been pre-buried in civil engineering and are matched with the equipment do not need to be filled in the equipment anchor bolt table, and others need to be filled in. 10. The pipeline axonometric index and the pipe section table index are mainly for easy search 11. The pipe rack index mainly compiles non-standard push pipe racks into this table to facilitate search and check for missing items. 12. The spring summary table is mainly set up for the spring supports and hangers used in the project, including constant force hangers. It mainly summarizes the models, quantities, installation loads, working loads, thermal displacements, etc. of the spring supports and hangers required on the project pipelines for easy verification and inspection.
13. The special valve and pipeline accessories table is mainly used for the statistics of valves and pipeline accessories other than those generally used for opening, closing and connecting, to facilitate ordering and construction management. 14. This standard stipulates that the ground design elevation is EL100.000m, which completely avoids the elevations of various buildings, structures and various foundations in the device from being negative. 211
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