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API 5CT oil casing pipe
API 5CT oil casing pipe
API 5CT oil casing pipe
API 5CT oil casing pipe

API5CT J55, K55,N80,L80,P110,C90,T95,Q125 oil casing pipe

API 5CT is standard technical specifications for steel casing and tubing pipes used for oil wells in petroleum and natural gas industries.
Product introduction

Oil casing pipe details

Standard: API 5CT, API 5D
Steel Grades: K55, J55, L80-1 ,N80,C90,C95, P110, T95
Size: 2 3/8"-4 1/2"*0.167"-0630"

Casing Pipe
Tubing steel pipe
Oil Casing Pipe/Steel Pipe
Including ordinary casing, Anti-collapse casing, Anti-corrosion casing, Hi-strength casing
Serves as walls of a well;
Standard: API 5CT
Steel Grades: k55, J55, L80,N80,C90,C95, P110 T95, M65,E75,X95,G105,S135
 
1) Tubing 
OD: 2 3/8" -----4 1/2"
WT: 0.167" -----0.630"
 
Note: P : Plain end, N: Non upset, U: External upset, T&C: Threaded and coupled.
 
2) Casing
OD: 2 3/8“ ----20"
WT: 0.205" --- 0.5"
Note: P: Plain end, S: Short round thread, L: Long round thread
Length
R1 R2 R3
Tubing 6.10 -7.32 m 8.53-9.75m 11.58-12.80m
Casing 4.88 - 7.62m 6.72 -10.36m 10.36 - 14.63m

3) Drill Pipe
OD: 2 3/8" - 5 1/2"
WT: 0.280" - 0.449"
Note: EU: External upset , IEU: Internal & External upset
Thread of tool joint are right-hand or left hand
Thread are coper- plated or phoshphated

Technical data
Chemical Composition
Group Grade Type C Mn Mo Cr Ni max. Cu max. P max. S max. Si max.
min. max. min. max. min. max. min. max.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 H40 - - - - - - - - - - - 0.03 0.03 -
J55 - - - - - - - - - - - 0.03 0.03 -
K55 - - - - - - - - - - - 0.03 0.03 -
N80 1 - - - - - - - - - - 0.03 0.03 -
N80 Q - - - - - - - - - - 0.03 0.03 -
R95 - - 0.45 c - 1.9 - - - - - - 0.03 0.03 0.45
2 M65 - - - - - - - - - - - 0.03 0.03 -
  L80 1 - 0.43 a - 1.9 - - - - 0.25 0.35 0.03 0.03 0.45
  L80 9Cr - 0.15 0.3 0.6 0.9 1.1 8 10 0.5 0.25 0.02 0.01 1
  L80 13Cr 0.15 0.22 0.25 1 - - 12 14 0.5 0.25 0.02 0.01 1
  C90 1 - 0.35 - 1.2 0.25 b 0.85 - 1.5 0.99 - 0.02 0.01 -
  T95 1 - 0.35 - 1.2 0.25 d 0.85 0.4 1.5 0.99 - 0.02 0.01 -
  C110 - - 0.35 - 1.2 0.25 1 0.4 1.5 0.99 - 0.02 0.005 -
3 P110 e - - - - - - - - - - 0.030 e 0.030 e -
4 Q125 1 - 0.35   1.35 - 0.85 - 1.5 0.99 - 0.02 0.01 -
a The carbon content for L80 may be increased up to 0.50 % maximum if the product is oil-quenched. 
b The molybdenum content for Grade C90 Type 1 has no minimum tolerance if the wall thickness is less than 17.78 mm. 
c The carbon content for R95 may be increased up to 0.55 % maximum if the product is oil-quenched. 
d The molybdenum content for T95 Type 1 may be decreased to 0.15 % minimum if the wall thickness is less than 17.78 mm. 
e For EW Grade P110, the phosphorus content shall be 0.020 % maximum and the sulfur content 0.010 % maximum. 
NL = no limit. Elements shown shall be reported in product analysis.

 Mechanical Properties

Standard Type Tensile Strength
MPa
Yield Strength
MPa
Hardness
Max.
API SPEC 5CT J55 ≥517 379 ~ 552 ----
K55 ≥517 ≥655 ---
N80 ≥689 552 ~ 758 ---
L80(13Cr) ≥655 552 ~ 655 ≤241HB
P110 ≥862 758 ~ 965 ----
 
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