Description

API 5L X65 Steel Pipe is a type of oil and gas transportation supply pipe. The material of API 5L X65 Steel Pipe is X65 steel grade. This pipe is mainly used in the oil and oil and gas industry. API 5L X65 material gives the pipe very high resistance to crack growth. In addition, API 5L X65 Steel Pipe also has good weldability. This is because the chemical properties of API 5L X65 material are very basic. This steel has very good toughness at low temperatures when welding. Lastly, this material also has good wear resistance. This makes API 5L X65 Steel Pipe very suitable for high pressure environments and crude oil transportation.

API 5L X65 Steel Pipe can be used in a variety of industry applications, the most common being the oil and gas industry.

API 5L X65 Steel Pipe is also used for transportation and supply purposes in other industries.

API 5L X65 Steel Pipe is made of steel and is designed to be strong and durable. The thickness of the pipe wall varies depending on the application. For example, high-pressure applications usually use thicker pipe walls. Pipes can be welded or seamless and are usually cut to length before installation. API 5L X65 Steel Pipe is a versatile product that can be used in a variety of industries and applications.

Different Grades of API 5L X65 Steel Pipe:

1. API 5L X65 PSL-1 Pipe is a standard carbon steel material that can be used in a variety of tree species and general purposes (non-corrosive environments, but certain mechanical properties are required in high-pressure pipelines).

Therefore, its C, Mn, Si, P and S content is much higher than the other two varieties. (When the concentration of these chemical components is lower, the purity of the steel is higher). The minimum yield strength is 450 MPa (65,300 psi) and the minimum tensile strength is 535 MPa (65,300 psi) (77,600 psi).

2. API 5L X65 PSL-2 (also known as API 5L X65Q.M or L450Q/M) has lower C, Si, Mn, P and S values than API 5L X65 PSL-1. The values of C, Si, Mn, P and S are lower than those of API 5L X65 PSL-1. Because PSL-2 requires CEq less than 0.43 and CEpcm less than 0.25. (Ceq means carbon equivalent, which affects the weldability and strength of the steel).

Therefore, the mechanical strength of API 5L X65 PSL-2 pipe (welded and seamless) is limited to the following maximum values: yield strength 450 – 600 Mpa (65300 psi – 87000 psi), tensile strength 535 – 760 Mpa (65300 psi – 87000 psi) (77600 psi – 110200 psi).

3. API 5L X65 sour service pipe (X65QS/MS, L415QS/MS), C maximum value is 0.10, Mn maximum value is 1.45, Si maximum value is 0.45, P maximum value is 0.020, S maximum value is 0.002, V maximum value is 0.10, Nb maximum value is 0.08, Ti maximum value is 0.06, CEPcm maximum value is 0.22.

The chemical composition of sour service line pipes must be strictly controlled. Therefore, to protect the steel pipes from corrosive conditions such as H2S, low carbon and low CEPcm values reduce the content of martensite, which easily produces H bubbles, thereby improving the corrosion resistance of the steel pipes to H2S. The mechanical strength of these steel pipes is the same as API 5L X65 PSL2 steel pipes.

The American Petroleum Institute API 5L specification applies to pipeline steel pipes used in pipelines that transport oil, natural gas, and water. The specification covers two types of line pipes: seamless pipes and welded pipes. Seamless pipes are made from a single piece of metal, while welded pipes are made by joining metal sheets together. The specification covers a wide range of diameter sizes, ranging from 2 inches to 60 inches. In addition, the specification covers several grades of pipes ranging from mild steel to high yield strength steel. API 5L specification is widely used in the oil and gas industry because it provides a reliable and consistent way to transport these materials.

Specifications of Pipeline Steel Pipe:

Standard	Product Level	Steel grade	Yield Strength (min), Mpa	Tensile Strength（MPa）
API 5L GB/T9711.2	PSL 1	A or L210	210	335
		B or L245	245	415
		x42 or L290	290	415
		X46 or L320	320	435
		X52 or L360	360	460
		X56 or L390	390	490
		X60 or L415	415	520
		X70	483	565
	PSL 2	BR or L245R	245~450	415~760
		X42R or L290R	290~495	415~760
		BN or L245N	245~450	415~760
		X42N or L290N	290~495	415~760
		X46N or L320N	320~525	435~760
		X52N or L360N	360~530	460~760
		X56N or L390N	390~545	490~760
		X60N or L415N	415~565	520~760
		X65N or L450N	425~566	525~760
		X70 or L480	484~565	565~768
		X80	552~690	621~827

oduct Level	Steel grade	Chemical composition, %
oduct Level	Steel grade	C	Mn	P	S	Si	V	Nb	Ti	CEpcm
PSL 1	B or L245	≤0.28	≤1.20	≤0.030	≤0.030	–	–	–	–	–
	x42 or L290	≤0.28	≤1.30	≤0.030	≤0.030	–	–	–	–	–
	X46 or L320	≤0.28	≤1.40	≤0.030	≤0.030	–	–	–	–	–
	X52 or L360	≤0.28	≤1.40	≤0.030	≤0.030	–	–	–	–	–
	X56 or L390	≤0.28	≤1.40	≤0.030	≤0.030	–	–	–	–	–
	X60 or L415	≤0.28	≤1.40	≤0.030	≤0.030	–	–	–	–	–
	X70	≤0.28	≤1.40	≤0.030	≤0.030	–	–	–	–	–
PSL 2	BR or L245R	≤0.24	≤1.20	≤0.025	≤0.015	≤0.40	c	c	≤0.04	≤0.25
	X42R or L290R	≤0.24	≤1.20	≤0.025	≤0.015	≤0.40	≤0.06	≤0.05	≤0.04	≤0.25
	BN or L245N	≤0.24	≤1.20	≤0.025	≤0.015	≤0.40	c	c	≤0.04	≤0.25
	X42N or L290N	≤0.24	≤1.30	≤0.025	≤0.015	≤0.40	≤0.06	≤0.05	≤0.04	≤0.25
	X46N or L320N	≤0.24	≤1.40	≤0.025	≤0.015	≤0.40	≤0.07	≤0.05	≤0.04	≤0.25
	X52N or L360N	≤0.24	≤1.40	≤0.025	≤0.015	≤0.45	≤0.10	≤0.05	≤0.04	≤0.25
	X56N or L390N	≤0.24	≤1.40	≤0.025	≤0.015	≤0.45	≤0.10	≤0.05	≤0.04	≤0.25
	X60N or L415N	≤0.24	≤1.40	≤0.025	≤0.015	≤0.45	≤0.10	≤0.05	≤0.04	–
	X65N or L450N	≤0.24	≤1.40	≤0.025	≤0.015	≤0.45	≤0.10	≤0.05	≤0.04	–
	X70N	≤0.24	≤1.40	≤0.025	≤0.015	≤0.45	≤0.10	≤0.05	≤0.04	–
	X80	≤0.24	≤1.40	≤0.025	≤0.015	≤0.45	≤0.10	≤0.05	≤0.04	–