Casing Pipe

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TUBING AND CASING PIPE
Casing Pipe are made from carbon steel. Oil casing tubing is used to extracting petroleum and natural gas from a well. Casing serves as wall of well.

Tolerance

Item Tolerance
Out Diameter Pipe Body D≤101.6mm+-0.79mm
D≥114.3mm+1.0%D-5%D
Coupling +-1%D
WT 0-12.5%t
Weight Single Lengths +6.5%-3.5%
Carload Lots 0-1.75%

Mechanical Properties

Grade Yield Strength Tensil Strength Hardness Allowable Hardness
Variation
Min Max Min Max
Psi Mpa Psi Mpa Psi Mpa Hrc Bhn Hrc
J55 55,000 379 80,000 552 75,000 517
K55 55,000 379 80,000 552 95,000 655
N80 80,000 552 80,000 758 100,000 689

Chemical Composition (%)

Grade Chemical Composition
C Si Mn P S Cr Ni Cu V Als
J55/K55
(37Mn5)
0.34-0.39 0.20-
0.35
1.25-1.50 ≤0.02 ≤0.015 ≤0.15 ≤0.20 ≤0.20 ≤0.02
N80(36Mn2V) 0.34-0.38 0.25-0.40 1.45-1.70 ≤0.02 ≤0.015 ≤0.15 ≤0.20 ≤0.20 0.11-0.16 ≤0.02