Pipe fitting identification is a critical practice utilized to ensure pipeline safety, standardize management, and establish after-sales traceability. The specifications for pipe fitting identification are as follows:
•Permanent identification
It is essential that the marking method used for pipe fittings is permanent, resistant to stress, and does not fade or peel over time. Durable methods like laser corrosion marks or dot matrix low-stress steel marks are recommended. Permanent identification is mandatory unless specifically requested by the client.
• Standard font
The content of the sign must be clear and legible.
•Marking content
The identification should include essential information such as the name, nominal size, wall thickness, material, standard, heat number, and more.
If space constraints prevent the inclusion of all details, prior agreement with the customer is necessary. While some details like manufacturing standards or pipe fitting codes may be omitted, the material and furnace number must always be included.
•Marking Code
GB/T 12459-2017
Name
Outside Diameter
Marking Code
SMLS Pipe Fittings
Welding Pipe Fittings
45 Deg Elbow
R=1.5D
45EL
W45EL
3D
45E3D
W45E3D
90 Deg Elbow
R=1.0D
90ES
W90ES
R=1.5D
90EL
W90EL
3D
90E3D
W90E3D
180 Deg Elbow
R=1.0D
180EL
W180EL
R=1.5D
180ES
W180ES
Reducer
CON.
RC
WRC
ECC.
RE
WRE
Tee
Straight
TS
WTS
Reducing diameter
TR
WTR
Cross
Straight
CRS
WCES
Reducing diameter
CRR
WCRR
Cap
/
C
WC
Lap joint Stub End
Long
LJL
WLJL
Short
LJS
WLJS
Note: It can use Angle digit + product name code for special degree elbow
ASME B16.9
Name
Outside Diameter
Marking Code
45 Deg Elbow
R=1.5D
LR45
90 Deg Elbow
R=1.5D
LR90
R=1.0D
SR90
180 Deg Elbow
R=1.5D
LR180
R=1.0D
SR180
•Color Contrast
To facilitate quick identification, the color of the sign should contrast with the surface color of the pipe fitting.
• Qualified certificate
It is significant to confirm with clients whether the TS number or certificate number needs to be marked on the pipe fitting.
Overall, adherence to these professional pipe fitting identification practices ensures safety, clarity, and traceability in pipeline management.
