This standard mainly takes into account the fact that most design units, including the provincial chemical design institute, still integrate the process system and pipeline specialty. Therefore, the content includes all process construction drawings including process flow, design instructions, layout, piping and various table formats. HG 20519.38-1992 Pipeline grade number and pipeline material grade table HG20519.38-1992 Standard download decompression password: www.bzxz.net

Pipeline grade number and pipeline material
Grade table
HG 20519.38-92
Pipeline grade number and pipeline material grade table
HG 20519.38-92
1 Pipeline grade number
1.0.1 Pipeline grade number consists of the following three units:A1
The third unit indicates the type of pipeline material
The second unit indicates the sequence number
The first unit indicates the nominal pressure of the pipeline
1.0.2The first unit: The nominal pressure (MPa) grade code of the pipeline, expressed in uppercase English letters.AK is used for ANSI standard pressure grade code (I and J are not used), and L~Z is used for domestic standard pressure grade code (O and X are not used).
Pressure level
For ANSI standard
Pressure level
For domestic standard
-150LB
—400LB
U—-22.0MPa
V—--25.0MPa
-1500LB
-2500LB
The second unit is the sequence number, expressed in Arabic numerals, starting from 1. 1.0.3
1.0.4The third unit: Pipe material category, expressed in uppercase English letters. 202
A Cast iron
B Carbon steel
C—Ordinary low alloy steel
D—Alloy steel
E—Stainless steel
F Nonferrous metal
G—Non-metal
H—Liner and internal corrosion protection
2 Pipeline material grade table
2.0.1 The format of the pipeline material grade table is shown in the attached table. 2.0.2 Instructions for filling in the pipeline material grade table: 2.0.2.1 Instructions for filling in each column in the title column of pipes and pipe fittings: (1) Product column: For pipes, fill in SMLS (seamless), EFW (electric fusion welding), ERW (electric resistance welding). For pipe fittings (elbows, tees, reducers, pipe caps), fill in S (seamless), W (welded). (2) End column: For pipes, fill in BE (bevel), PE (flat end), TE (threaded). For pipe fittings, fill in PE (plain end), SCRD (thread), SW (socket). (3) Wall thickness column: For pipes, fill in Sch××× (pipe number) or millimeters. For socket fittings, fill in the pound class, such as 3000*. (4) Reference drawing column: Fill in the standard number or reference drawing number. 2.0.2.2 Instructions for filling in each column in the title column of flanges, gaskets and bolts/nuts: (1) Type column: For flanges, fill in SW (socket), SO (slip-on), WN (butt welding), etc. For gaskets, fill in the thickness value, such as 4.5t. For bolts, fill in SB (double-headed), MB (single-headed). (2) Sealing surface column: For flanges, fill in RF (raised face), MF (convex and concave face), TG (grooved face), etc. 2.0.2.3 Instructions for filling in each column in the title column of valves: (1) Connection type column: Fill in FLGD (flange), SW (socket), SCRD (thread), etc. (2) Type column: For check valves, fill in: LIFT (lift), SWNG (swing), etc. (3) Valve number column: Fill in the valve model.
Reducer
Pipe joint
Bolts and nuts
Stop valve
Check valve
Nominal diameter
Nominal diameter
Nominal diameter
Connection type
Project name:
Pipe material grade table
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Grade number
Reference drawing
Reference drawing
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