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Casing Pipe

Size: OD: 114.3mm-508mm
WT: 5-16mm
LENGTH: R1, R2, R3
Pipe Standard: API 5CT PSL1/PSL2 J55,K55,N80-1,N80-Q,API 5CT PSL1/PSL2 L80-1, L80-9Cr,L80-13Cr,C90, C95, P110, Q125

Classification :

OCTG

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info@northsteelgroup.com

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Specification

◎OCTG Casing Introduction

Product:	Casing Pipe, Oil Casing, API Casing, Well Casing, Casing
Application:	Used for oil casing and tubing in oil wells as well as sidewall
Size:	OD: 114.3mm-508mm
	WT: 5-16mm
	LENGTH: R1, R2, R3
Pipe Standard:	API 5CT PSL1/PSL2 J55,K55,N80-1,N80-Q,
Pipe Standard:	API 5CT PSL1/PSL2 L80-1, L80-9Cr,L80-13Cr,C90, C95, P110, Q125
Thread:	NUE, EUE, STC, LTC, BTC, XC,HYDRILL CS
Special Service	Sweet Service, Sour Service, Anti-H2S, NACE MR0175/ISO15156
Accessories:	Pup Joint, Coupling, Drill Collar, Crossover etc.

Oil casing	R1	R2	R3
Oil casing	4.88-7.62m	7.62-10.36m	10.36-14.63m

◎OCTG Casing Pipe Connections

API 5CT is applicable to following connections which complied with API SPEC 5B:

• SC: Short round thread casing

• LC: Long ound thread casing

• BC: Buttress thread casing

• NU: Non-upset tubing

• EU: External upset tubing

• IJ: Integral tubing connections

◎Steel Casing Pipe Application

1, API SPCE 5L For the function of transport of gas, water, oill in oil & gas sector.
2, API SPEC 5CT Tubes is used in drawing out oil & gas. casing pipe works as wall surface of well.
3, ASTM A106 For the objective of the pipeline task of central heating boiler, water & oil.
4, ASTM A53 It is made use of for sharing water, petroleum, gas as well as various other typical liquids.
5, ASTM A179 For tubed warm exchanger and also similar warm sharing equipments.
6, ASTM A192 For manufacture wall panel, economizer, reheater, superheater and vapor pipe of central heating boilers.

◎More casing pipes and their colors

Chemical composition

◎API 5CT Casing Pipe Chemical Compositions

Standard	Grade	Chemical compositions（％）
API SPEC 5CT	J55	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	V
	K55	0.34～0.39	0.20～0.35	1.25～1.50	≤0.020	≤0.015	≤0.15	≤0.20	≤0.20	/	/
	N80	0.34～0.38	0.20～0.35	1.45～1.70	≤0.020	≤0.015	≤0.15	/	/	/	0.11～0.16
	L80	0.15～0.22	≤1.00	0.25～1.00	≤0.020	≤0.010	12.0～14.0	≤0.20	≤0.20	/	/
	P110	0.26～0.395	0.17～0.37	0.40～0.70	≤0.020	≤0.010	0.80～1.10	≤0.20	≤0.20	0.15～0.25	≤0

◎API 5CT Casing Pipe Mechanical Properties

Grade	Type	Total elongation under load (%)	Yield strength (min)	Yield strength (max)	Tensile strength min Mpa	Hardness Max (HRC)	Hardness Max (HBW)
J55	-	0.5	379	552	517
K55	-	0.5	379	552	655
N80	1	0.5	552	758	689
N80	Q	0.5	552	758	689
L80	1	0.5	552	655	655	23	241
L80	9Cr	0.5	552	655	655	23	241
L80	13Cr	0.5	552	655	655	23	241
C90	-	0.5	621	724	689	25.4	255
C95	-	0.5	655	758	724
T95	-	0.5	655	758	724	25.4	255
P110	-	0.6	758	965	862
Q125	All	0.65	862	1034	931

Process

Tests

◎Quality Control System
1. In order to ensure that the original and auxiliary materials used are qualified products, the company evaluates and selects qualified suppliers according to GB/T19001-2000-ISO9001:2000 and API standards. Inspected by the raw material inspector of the Quality Management Department, unqualified raw materials and accessories may not be put into use.
2. Casing pipe diameter test: This test is used to detect the straightness of the pipe body and detect whether there is a bump in the pipe wall.
3, Quality inspection is for the finished product testing, quality inspection staff need to check to ensure that the product has no obvious defects and all the tubes are in compliance with the required parameters and length.
4. Tubing collar size and appearance inspection: QC staff inspects the size and surface of the steel pipe to ensure compliance.
5. Hydrostatic test: The pipe body will be rolled into the hydrostatic tester and water will be injected into the pipe body to ensure that the pipe body can withstand the internal water pressure and ensure that the pipe body does not leak.
6. Physical and chemical analysis of casing collar: This test is used to analyze the chemical composition, mechanical properties, and metal structure of the raw materials in the pipe.
7. Casing pipe thread test: The production personnel will physically inspect the thread after the yarn stage in the production process to ensure compliance.

Packing & Delivery

Keyword:North Steel Manufacturing