Bangdong Pipe fitting classification, identification and code

First, the classification of pipe fittings

In general, in the entire pipeline, various accessories other than straight pipes can be collectively referred to as pipe fittings. However, it is customary to refer to the elbows, tees, heads, caps, and various pipe joints as pipe fittings, and to refer to flanges, valves, expansion joints, and pipe supports, respectively.

1. According to the material, stainless steel pipe fittings, carbon steel pipe fittings, PVC pipe fittings, etc.

2, according to the category, elbow size, head, tee, etc.

3. According to the manufacturing method, there are casting pipe fittings, hydraulic pipe fittings, etc.

4. According to whether the surface of the pipe fittings has welds, the pipe fittings can be divided into two types: seamed pipe fittings and seamless pipe fittings. GB12459-90 is the standard for seamless pipe fittings, and GB/T13401-92 is the standard for seamed pipe fittings.

Second, the pipe fittings identification:

The so-called pipe fittings, that is, for a certain type of pipe fittings, it is necessary to know which parameters can be uniquely determined, and the characteristics of such pipe fittings. Generally speaking. The following parameters must be known:

(1) Category (the elbow also needs to know the angle, the bending radius; the size of the head also needs to know whether it is concentric or eccentric)

(2) Material

(3) The size and control of the diameter (in the case of the nominal diameter, the metric, imperial system must be confirmed),

(4) Wall thickness or pipe number.

(5) Standard number (sometimes after the standard number, add A or B to indicate that the pipe system is imperial or metric)

For example: 45° elbow R=1.5D, 304L, DN100, SCH20, GB12459B

Eccentric head, 20#, DN150B STD ANSI B16.9

Three-way 316TI φ610*168*4 GB/T13401

Third, various pipe fittings code

1, the connection type code

Connection type code connection type code connection type code

Butt welding B socket welding S thread T

2, commonly used material brand code

Steel type steel code steel grade steel code

Carbon steel 10C1 16MM1

20C212CrMoM2

20GC315CrMoM3

Q235(A3)C41Cr5MoM4

WPB (A106-B) C512Cr1MoVM5

SGPC6 1Cr18Ni9Ti, 321S1

STPG38C7 0Cr19Ni9, 304S2

STPG42C8 00Cr18Ni10, 304LS3

0Cr18Ni12Mo2Ti, 316S4

00Cr17Ni14Mo2, 316LS5

3, pipe type code

Variety category code variety category code

45o elbow long radius 45EL reducer concentric RC

Equal path 45ES eccentric RE

Reducing 45ER cap C

90o elbow long radius 90EL double socket pipe hoop equal diameter FCS

Short radius 90ES reducer FCR

Equal diameter 90ES single socket pipe clamp HC

Reducing 90ER double interface pipe clamp FC

180o elbow long radius 180EL single interface hose clamp HC

Short radius 180ES union U

Three-way equal-diameter TS pipe plug square head SHP

Reducing TR hex head HHP

Four-way equal diameter CRS round head RHP

Reducing CRR inner and outer threaded joint hexagon head HHP

45oY type three-way equal diameter 45YS flat FB

Reducing 45YR socket OL

Flanged short section LS

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