An Overview of the Myanmar-China Oil & Gas Pipelines: History, Benefits, and Challenges.

 API 5CT L80 casing Tubing Grade Color Codes
Grade Grade Type Number and Color of Bands for Product a with Length ³ 1.8 m Color(s) for Couplings
      Entire Coupling Band(s) b, c
1 2 3 4 5
H40 None or black band at the manufacturer’s option None Same as for Pipe
J55 Tubing One bright green Bright green None
J55 Casing One bright green Bright green One white
K55 Two bright green Bright green None
N80 1 One red Red None
N80 Q One red, one bright green Red Green
R95 One brown Brown None
L80 1 One red, one brown Red One brown
L80 9Cr One red, one brown, two yellow None Two yellow
L80 13Cr One red, one brown, one yellow None One yellow
C90 1 One purple Purple None
T95 1 One silver Silver None
C110 One white, two brown White Two brown
P110 One white White None
Q125 1 One orange Orange None
a In the case of coupling Material, unless otherwise specified in the purchase agreement, the manufacturer’s internal requirements shall govern.
b Special clearance couplings shall also have a black band.
c Seal-ring couplings shall also have a blue band.

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