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API 5L Line Pipe - X52/X65 Seamless Steel Tube for Oil & Gas Pipeline Transportation

API 5L X52 ERW Line Pipe with beveled end - precision cut and chamfered for butt-welding field joint connection

$Review X65 DWTT and CVN impact test results for fracture toughness$ $Review X65 DWTT and CVN impact test results for fracture toughness$ $Review X65 DWTT and CVN impact test results for fracture toughness$ $Review X65 DWTT and CVN impact test results for fracture toughness$

API 5L seamless line pipe - no weld seam for high-pressure and sour service applications

API 5L X65 LSAW line pipe - large diameter longitudinally welded tube for trunk line transmission

API 5L X65 Seamless Line Pipe - high-strength grade with stencil marking for offshore pipeline projects

Line Pipe

Keywords: Line Pipe, API Line Pipe, Seamless Line Pipe, Carbon Steel Line Pipe, Oil Pipeline
Size: Out Diameter: 2 3/8" - 4 1/2" (60.3mm-114.30mm)； Wall Thickness: 0. 205"- 0.635" ；Length: R1(4.88mtr-7.62mtr), R2(7.62mtr-10.36mtr), R3(10.36mtr or longer)
Standard & Grade : API5L,ASTM A106/A53
Ends: Square Ends/Plain Ends (Straight Cut, Saw Cut, Torch Cut)
Packing: Bundle Or Bulk, Seaworthy Packing, or for the Client's Requirement
Usage: For Conveying Gas, Water, and Oil, Either in the Oil or Natural Gas Industries
Surface Coating: Epoxy Coating / Colour Paint Coating / 3LPE Coating
Type: Seamless / ERW / Welded / Fabricated / CDW


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Casing: Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or the wellbore. It is inserted into a well bore and cemented in place to protect both subsurface formations and the well bore from collapsing and to allow drilling fluid to circulate and extraction to take place. Steel Casing Pipes have smooth walls & a minimum yield strength of 35,000 psi.

Tubing: Tubing is a pipe used for the transportation of crude oil and natural gas from an oil or gas layer to the surface after drilling is complete. It is made to withstand the pressure generated from the extraction process. Tubing is manufactured in the same way as casing, except that an additional process known as "upsetting" is applied to thicken the pipes.

API 5L pipeline is widely utilized in transporting petroleum, gas, water, and in the natural gas industry. API 5L refers to the American Petroleum Institute Prepared and published all over the world.

Petroleum, crude oil, gas, water, or natural gas through an API 5L pipeline is transported from the underground to the oil and natural gas industry corporation for further processing and production. Oil and gas pipeline includes seamless pipe and welding pipe and has three plain ends, threaded ends, and socket ends. Steel grade is mainly Grade B, X42, X46, X52, X56, X65, X70.

Seamless Pipe

Steel Grade: B, X42, X52, X60, X65, X70

Dimension: 1"/2" - 24"

Process: hot rolling, hot expanding

Welding Pipe

Steel Grade: B, X42, X52, X60, X65, X70, X80

Dimension: 2" - 30"

Process: ERW, SSAW, LSAW, HFW, JCOE.

Standard: API 5L / ISO 3183 Hot Rolled

Type: Seamless / ERW / Welded / Fabricated / CDW

Outer Diameter Size: 3/8" NB To 30" NB (Nominal Bore Size)

Wall Thickness: Schedule 20 To Schedule XXS (Heavier On Request) Up to 250 mm Thickness

Length: 5 To 7 Meters, 09 To 13 Meters, Single Random Length, Double Random Length And Customize Size.

Pipe Ends: Plain Ends / Beveled Ends / Coupling

Surface Coating: Epoxy Coating / Colour Paint Coating / 3LPE Coating.

Grades: API 5l Grade B X42, API 5l Grade B X46, API 5l Grade B X52, API 5l Grade B X56, API 5l Grade B X60, API 5l Grade B X65, API 5l Grade B X70

API 5L Pipe Chemical And Mechanical Properties

The yield strength of an API 5L pipe is specified with the number that follows the X in the material grade designation (in kilopounds per square inch – i.e., KSI). So, for instance, an API 5L X52 pipe has a minimum yield strength of 52 KSI.

The table shows the chemical composition of API 5L steel pipes PSL1 and PSL2 from Grade A to Grade X70, as well as their mechanical properties.

Application of API 5L Line Pipe

- Oil & Gas Industry

- Natural Gas Industry

- Petroleum Industry

- Fluid transportation

- Automobile application

- Infrastructure construction

- Fabrication industrial

- Construction project

- Chemical Industry

Chemical Analysis (%):

Standard	Type of pipe	Class	Grade	C	Si	Mn	P	S	V	Nb	Ti
Standard	Type of pipe	Class	Grade	max	max	max	max	max	max	max	max
API SPEC 5L	SMLS	PLS1	L245 B L290 X42 L320 X46 L360 X52 L390 X56 L415 X60 L450 X65 L485 X70 L245N BN	0.28 0.28 0.28 0.28 0.28 0.28 0.28 0.28 0.24	0.4	1.20 1.30 1.40 1.40 1.40 1.40 1.40 1.40 1.20	0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.025	0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.015	———	———	0.04
		PLS2	L290N X42N	0.24	0.4	1.2	0.025	0.015	0.06	0.05	0.04
			L320N X46N	0.24	0.4	1.4	0.025	0.015	0.07	0.05	0.04
			L360N X52N	0.24	0.45	1.4	0.025	0.015	0.1	0.05	0.04
			L390N X56N	0.24	0.45	1.4	0.025	0.015	0.1	0.05	0.04
			L415N X60N	0.24	0.45	1.4	0.025	0.015	0.1	0.05	0.04
	WELD	PLS1	L245 B	0.26	-	1.2	-	0.03	0.03	-	-
			L290 X42	0.26	-	1.3	-	0.03	0.03	-	-
			L320 X46	0.26	-	1.4	-	0.03	0.03	-	-
			L360 X52	0.26	-	1.4	-	0.03	0.03	-	-
			L390 X56	0.26	-	1.4	-	0.03	0.03	-	-
			L415 X60	0.26	-	1.4	-	0.03	0.03	-	-
			L450 X65	0.26	-	1.45	-	0.03	0.03	-	-
			L485 X70	0.26	-	1.65	-	0.03	0.03	-	-
		PLS2	L245M BM	0.22	0.45	1.2	0.025	0.015	0.05	0.05	0.04
			L290M X42M	0.22	0.45	1.3	0.025	0.015	0.05	0.05	0.04
			L320M X46M	0.22	0.45	1.3	0.025	0.015	0.05	0.05	0.04
			L360M X52M	0.22	0.45	1.4	0.025	0.015	-	-	-
			L390M X56M	0.22	0.45	1.4	0.025	0.015	-	-	-
			L415M X60M	0.12	0.45	1.6	0.025	0.015	-	-	-
			L450M X65M	0.12	0.45	1.6	0.025	0.015	-	-	-
			L485M X70M	0.12	0.45	1.7	0.025	0.015	-	-	-
			L555M X80M	0.12	0.45	1.85	0.025	0.015	-	-	-

Mechanical Properities:

Standard	Class	Grade		Yield strength not less than (MPa)	Tensile strength (MPa)	Elongation(%)	Y.S/T.S
API SPEC 5L ISO 3183	PLS1	L245B	min	245	415	b	-
		L290X42	min	290	415	b	-
		L320X46	min	320	435	b	-
		L360X52	min	360	460	b	-
		L390X56	min	390	490	b	-
		L415X60	min	415	520	b	-
		L450X60	min	450	535	b	-
		L485X70	min	485	570	b	-
	PLS2	L245N BN	min	245	415	b	-
		L245M BM	max	450	760	b	0.93
		L290NX42N	min	290	415	b	-
		L290MX42M	max	495	760	b	0.93
		L320NX46N	min	320	435	b	-
		L320MX46M	max	525	760	b	0.93
		L360NX52N	min	360	460	b	-
		L360MX52M	max	530	760	b	0.93
		L390NX56N	min	390	490	b	-
		L390MX56M	max	545	760	b	0.93
		L415NX60N	min	415	520	b	-
		L415MX60M	max	565	760	b	0.93
		L450MX65M	min	450	535	b	-
		L450MX65M	max	600	760	b	0.93
		L485MX70M	min	485	570	b	-
		L485MX70M	max	635	760	b	0.93
		L555MX80M	min	555	625	b	-
		L555MX80M	max	705	825	b	0.93

Toughness:

Standard	Grade	Transverse minimum impact of Pipe body					Transverse minimum impact of weld (J)
		(J)
		D=508	508mm<D=762mm	762mm<D=914mm	914mm<D=1219mm	1219mm<D=1422mm	D<1422mm	D=1422mm
API SPEC 5L	=L415×60	27(20)	27(20)	40(30)	40(30)	40(30)	27(20)	40(30)
	>L415×60	27(20)	27(20)	40(30)	40(30)	54(40)	27(20)	40(30)
	=L450×65
	>L450×65	27(20)	27(20)	40(30)	40(30)	54(40)	27(20)	40(30)
	=L485×70
	>L485×70	40(30)	40(30)	40(30)	40(30)	54(40)	27(20)	40(30)
	=L555×80

Note: (1) The values in the table be suitable for the full size standard sample.

(2) The values inside bracket is the minimum single value, outside bracket is the average value.

(3) Test Temperature: 0°C.

What is OCTG, and what are its main components?

OCTG stands for Oil Country Tubular Goods. It is a family of seamless or welded steel pipes specifically designed for use in oil and gas wells. OCTG is essential for drilling, completing, and producing from a well. The three primary components are:

Casing: The structural "backbone" of the well. It is run into the drilled hole to prevent the wellbore from collapsing and to isolate different underground formations (e.g., freshwater zones from oil/gas zones).

Tubing: The conduit placed inside the casing. It serves as the channel through which oil or gas is brought to the surface during production.

Drill Pipe: The heavy, thick-walled pipe used to transmit drilling fluid to the drill bit and to rotate the bit during the drilling process.

What steel grades do you supply, and what do they mean?

We supply a comprehensive range of API 5CT standard steel grades, each designed for specific well conditions. The grade indicates the minimum yield strength (in ksi) and the material's properties.

Group 1 (Standard Grades):

H40, J55, K55: General-purpose grades for shallow to medium-depth wells with low to moderate pressure. K55 is commonly used for surface casing.

Group 2 (Higher Strength):

N80 (Type 1 & 2): A versatile, high-strength grade suitable for a wide range of applications, including intermediate and production casing.

L80 (Type 1, 9Cr, 13Cr): Designed for sour service environments (containing H₂S). L80-13Cr offers superior corrosion resistance.

Group 3 (High Performance):

C90, T95: Used in high-pressure, high-temperature (HPHT) wells and sour service applications.

P110, Q125: High-strength grades for deep wells and high-pressure environments where maximum burst and collapse resistance are required.

What types of connections (threads) are available?

The connection is a critical component of any OCTG string. We offer both standard API connections and advanced Premium Connections.

API Connections:

Short Round Thread (STC): A simple, cost-effective connection for shallow wells.

Long Round Thread (LTC): Similar to STC but with a longer thread for slightly better performance.

Buttress Thread (BTC): Provides high tensile strength and is suitable for deeper, heavier wells.

Premium Connections (Non-API):

These are engineered for extreme conditions, offering superior gas-tight sealing, high tensile strength, and excellent fatigue resistance. They are essential for HPHT wells, deepwater applications, and complex well geometries. We can supply various premium connection types based on your specific project requirements.

How do you ensure the quality and integrity of the pipes?

We implement a rigorous multi-stage quality control process to ensure every pipe meets the required specifications:

Chemical Composition Analysis: Verifying the steel grade's elemental makeup.

Mechanical Property Testing: Including tensile, yield, hardness, and impact tests.

Hydrostatic Testing: Every pipe is pressure-tested to ensure it can withstand specified internal pressures without leaking.

Non-Destructive Testing (NDT): We utilize advanced NDT methods such as Ultrasonic Testing (UT) and Electromagnetic Testing (ET) to detect any internal or surface imperfections.

Dimensional Inspection: Precise measurement of outside diameter (OD), wall thickness, weight, and length.

What is your typical lead time and packaging for export?

Lead Time: For standard API grades and sizes, our lead time is typically 15-30 days after receiving the deposit and final order confirmation. For specialized grades or premium connections, the timeline may be longer.

Packaging: To ensure safe ocean transport, all OCTG products are securely packed. Threads are protected with steel or plastic protectors, and pipes are bundled with steel straps. We can also apply anti-corrosion oil or varnish and use wooden crates for extra protection as per customer requirements.