API SPEC 5 Lhigh frequency welded pipe ERW

API SPEC 5 Lhigh frequency welded pipe ERW

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 10 m.t.

Supply Capability:: 3500 m.t./month

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ERW Welded Steel Pipes

Application of API ERW Line Pipes :

It is widely applied to line pipe and casing and tubing in oil transportation and casing field, and it is used in Low,high pressure liquid and gassy transportation and it is also good Structure pipe (for furniture, window, door, building , bridge, mechanical etc).

Package of API ERW Line Pipes:

bundles with anti-rust painting and with plastic caps

Standard of API ERW Line Pipes:

API SPEC 5L, API SPEC 5CT, ASTM A53, GB/T9711.1

Steel Grade of API ERW Line Pipes:

API SPEC 5L: B, X42, X46, X52, X56, X60, X65

API SPEC 5CT: J55, K55, N80, L80-1

ASTM A53: A, B, C

GB/T9711.1:L242、L290、L320、L360、L390、L415、L450

Sizes of pipes of API ERW Line Pipes:

*Remark: Besides below sizes, we also can arrange production based on requirement of customers

OD		WT			WEIGHT
INCH	MM	SCH	MM	INCH	KG/M	LB/INCH
1 1/2”	48.3	STD-40	3.68	0.145	4.09	2.75
1 1/2”	48.3	XS-80	5.08	0.2	5.47	3.68
2”	60.3	STD-40	3.91	0.154	5.49	3.69
2”	60.3	XS-80	5.54	0.218	7.56	5.08
2 1/2”	73	STD-40	5.16	0.203	8.72	5.86
2 1/2”	73	XS-80	7.01	0.276	11.52	7.74
3”	88.9	STD-40	5.49	0.216	11.41	7.67
3”	88.9	XS-80	7.62	0.3	15.43	10.37
3 1/2”	101.6	STD-40	5.74	0.226	13.71	9.21
3 1/2”	101.6	XS-80	8.08	0.318	18.83	12.65
4”	114.3	STD-40	6.02	0.237	16.24	10.91
4”	114.3	XS-80	8.56	0.337	22.55	15.15
5”	141.3	STD-40	6.55	0.258	21.99	14.78
5”	141.3	XS-80	9.53	0.375	31.28	21.02
6”	168.3	STD-40	7.11	0.28	28.55	19.19
6”	168.3	XS-80	10.97	0.432	42.99	28.89
8”	219.1	STD-40	8.18	0.322	42.98	28.88
8”	219.1	XS-80	12.7	0.5	65.3	43.88
10”	273	STD-40	9.27	0.365	60.9	40.92
10”	273	80	15.09	0.594	96.95	65.15
12”	323.8	STD	9.53	0.375	74.61	50.13
12”	323.8	40	10.31	0.406	80.51	54.1
12”	323.8	XS	12.7	0.5	98.42	66.14
12”	323.8	80	17.48	0.688	133.38	89.63
14”	355.6	40	11.13	0.438	95.51	64.18
14”	355.6	XS	12.7	0.5	108.48	72.9
14”	355.6	80	19.05	0.75	159.71	107.32
16”	406.4	XS-40	12.7	0.5	124.55	83.69
18”	457	STD	9.53	0.375	106.23	71.38
18”	457	40	14.27	0.562	157.38	105.75
18”	457	80	23.83	0.938	257.13	172.78
20”	508	40	15.09	0.594	185.28	124.5
20”	508	80	26.19	1.031	314.33	211.22

Machinical Properties

Standard	Grade	（MPa）	（MPa）	Min(%)
Standard	Grade	Yield strength	Tensile Strength	Elongation
GB/T9711.1	L245	≥245	≥415	21
	L290	≥290	≥415	21
	L320	≥320	≥435	20
	L360	≥360	≥460	19
	L390	≥390	≥490	18
	L415	≥415	≥520	17
	L450	≥450	≥535	17
	L485	≥485	≥570	17

Chemical Composition(%)

Standard	Grade	C	Mn	P	S
Standard	Grade	Max	Max	Max	Max
GB/T9711.1	L245	0.26	0.15	0.030	0.030
	L290	0.28	1.25	0.030	0.030
	L320, L360	0.30	1.25	0.030	0.030
	L390, L415	0.26	1.35	0.030	0.030
	L450	0.26	1.40	0.030	0.030
	L485	0.23	1.60	0.025	0.030

Standard: GB/9711.2

Mechanical Properties

Standard	Grade	（MPa） Yield strength		（MPa） Tensile Strength		Min(%) Elongation

GB/T9711.2		Rt0.5Min	Rt0.5Max	RmMin	Rt0.5/Rm Max
	L245	245	440		0.80	22
	L245				0.85
	L290	290	440		0.80	21
	L290				0.85
	L360	360	510		0.85	20
	L360				0.85
	L415	415	565		0.85	18
	L415				0.85
	L450	450	570	535	0.87	18
	L485	485	605	570	0.90	18

Chemical Composition (%)

Standard	Grade	C	Mn	P	S	V	Nb	Ti	CEV
Standard	Grade	Max	Max	Max	Max	Max	Max	Max	Max
GB/T9711.2	L245NB	0.16	1.1	0.025	0.020	-	-	-	0.42
	L290NB	0.17	1.2	0.025	0.020	0.05	0.05	0.04	0.42
	L360NB	0.20	1.6	0.025	0.020	0.10	0.05	0.04	0.45
	L415NB	0.21	1.6	0.025	0.020	0.15	0.05	0.04	-
	L245NB, L290NB	0.16	1.5	0.025	0.020	0.04	0.04	-	0.4
	L360NB	0.16	1.6	0.025	0.020	0.05	0.05	0.04	0.41
	L415NB	0.16	1.6	0.025	0.020	0.08	0.05	0.06	0.42
	L450NB	0.16	1.6	0.025	0.020	0.10	0.05	0.06	0.43
	L485NB	0.16	1.7	0.025	0.020	0.10	0.06	0.06	0.43

Standard: ASTM A53

Mechanical Properties

Standard	Grade	（MPa）	（MPa）
Standard	Grade	Yield strength	Tensile Strength
ASTM A53M	A	205	330
ASTM A53M	B	240	415

Chemical Composition(%)

Standard	Grade	C	Mn	P	S	V	Ni	Cu	Cr	Mo
Standard	Grade	Max	Max	Max	Max	Max	Max	Max	Max	Max
ASTM A53M	A	0.25	0.95	0.05	0.045	0.08	0.4	0.5	0.4	0.15
ASTM A53M	B	0.30	1.20	0.05	0.045	0.08	0.4	0.5	0.4	0.15

Q: What are the specific differences between flexible pipes and rigid pipes?: Structurally:A rigid waterproof sleeve is welded with a water stop ring outside the steel pipe;The flexible waterproof casing pipe is welded on the outside of the 3 side wing ring, 4 screw buckle, inside a welding piece with a rubber ring, the outside and do a flange, with 4 double head bolt, welding a steel pipe, the pipe installed, the flange is installed. The screw fastening, tightening the apron is bigger, more Water Leakage, generally in the waterproof requirements of relatively high places, such as the pool of water.

Q: Are steel pipes suitable for nuclear power plants?: Yes, steel pipes are suitable for nuclear power plants. Steel is a commonly used material in the construction of nuclear power plants due to its excellent mechanical properties, high strength, and durability. Steel pipes are used in various applications within these plants, including the transportation of cooling water, hot gases, and steam. The steel used in nuclear power plants is carefully selected and tested to meet stringent safety regulations and quality standards. It is crucial for these pipes to have excellent resistance to corrosion and high-temperature environments, as they are exposed to harsh conditions such as high pressure, high temperatures, and radioactive materials. Furthermore, steel pipes have a long service life and require minimal maintenance, making them a cost-effective choice for nuclear power plants. They can withstand extreme conditions, ensuring the safe and reliable operation of the plant. Additionally, steel pipes can be easily fabricated, installed, and repaired, which is essential for the efficient functioning of a nuclear power plant. Overall, steel pipes are highly suitable for nuclear power plants due to their strength, durability, resistance to corrosion, and ability to withstand extreme conditions.

Q: What are the different types of joints used with steel pipes?: There are several types of joints used with steel pipes, including threaded joints, welded joints, flanged joints, and grooved joints.

Q: What are the industries that commonly use steel pipes?: Some of the industries that commonly use steel pipes include construction, oil and gas, manufacturing, transportation, and infrastructure.

Q: How long are the seamless tubes? Are they six meters long?: The length of the seamless tube is 3000~12000mm, including 6 meters.

Q: The outer circle of a seamless steel pipe 50 head into the outer circle of the 40 to close: Cold drawn steel tube and cold rolled steel pipe mill is a complete set of equipment which combines cold rolling, cold drawing, cold rolling and cold drawing to produce pipes. It is a unit for deep processing of hot-rolled pipes or welded pipes.

Q: What is the difference between internal lining and external coating of steel pipes?: The difference between internal lining and external coating of steel pipes lies in their respective purposes and locations. Internal lining refers to the material applied inside the steel pipes to protect the inner surface from corrosion, abrasion, or other forms of damage. It acts as a barrier between the transported fluids or substances and the steel pipe, preventing them from coming into direct contact and causing deterioration. The internal lining is typically made of materials like epoxy, polyethylene, or cement mortar, depending on the specific requirements and the nature of the transported substances. It ensures the longevity and integrity of the steel pipe by reducing the chances of internal corrosion and minimizing the risk of contamination. External coating, on the other hand, is applied to the outer surface of the steel pipes. Its main purpose is to provide protection against external factors such as weathering, soil corrosion, and mechanical damage. The external coating acts as a shield, safeguarding the steel pipe from environmental conditions like moisture, UV radiation, chemicals, and physical impact. Common materials used for external coatings include fusion-bonded epoxy, polyethylene, polypropylene, or bitumen. The choice of coating depends on factors like the exposure conditions, temperature, and the type of soil or surroundings the steel pipe will encounter. In summary, while internal lining protects the inner surface of steel pipes from corrosion and damage caused by transported substances, external coating acts as a barrier against external elements and physical stresses. Both internal lining and external coating play vital roles in ensuring the durability and reliability of steel pipes in various applications, such as oil and gas pipelines, water supply systems, or industrial processes.

Q: Are steel pipes suitable for chemical processing plants?: Due to their exceptional strength, durability, and corrosion resistance, steel pipes find common usage in chemical processing plants. Particularly, stainless steel or alloy steel pipes possess the ability to endure high temperatures, pressure, and the corrosive impact of various chemicals. Consequently, they serve as a suitable means for the safe and efficient transportation and containment of diverse chemical substances. Moreover, the installation, maintenance, and repair of steel pipes are hassle-free, rendering them a cost-effective option for chemical processing plants. Nonetheless, it remains crucial to carefully select the appropriate steel type, taking into account factors such as the specific chemicals being processed, operating conditions, and any potential risks or compatibility issues. Regular inspections and maintenance are also vital for ensuring the integrity and performance of steel pipes in chemical processing plants.

Q: How are steel pipes used in structural applications?: Steel pipes are commonly used in structural applications due to their strength, durability, and versatility. They are often used as columns, beams, and braces in buildings, bridges, and other structures. Steel pipes provide excellent load-bearing capacity and can withstand high levels of stress and pressure, making them ideal for supporting heavy loads. Additionally, their hollow cylindrical shape allows for easy installation and provides space for utilities such as electrical wiring or plumbing. Overall, steel pipes contribute to the stability and integrity of structures, ensuring their safety and longevity.

Q: How are steel pipes specified in engineering drawings?: Steel pipes are specified in engineering drawings by providing information such as the diameter, thickness, material grade, length, and any additional specifications or requirements such as the type of coating or threading needed.

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