High Quality ERW Welded Steel Pipes System 1

High Quality ERW Welded Steel Pipes

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Loading Port:: China Main Port

Payment Terms:: TT or L/C

Min Order Qty:: 50MT m.t.

Supply Capability:: based on order m.t./month

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ERW Welded Steel Pipes

Application of High Quality ERW Welded Steel 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: bundles with anti-rust painting and with plastic caps

Standard of High Quality ERW Welded Steel Pipes

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

Steel Grade of High Quality ERW Welded Steel 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 High Quality ERW Welded Steel 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

Standard: API SPEC 5L

Mechanical Properties of High Quality ERW Welded Steel Pipes

Standard	Grade	（MPa）			（MPa）
		Yield strength			Tensile Strength
API SPEC 5L	PSL1
	B	≥241			≥414
	×42	≥290			≥414
	×46	≥317			≥434
	×52	≥359			≥455
	×56	≥386			≥490
	×60	≥414			≥517
	×65	≥448			≥531
	×70	≥483			≥565
	PSL2
		Min	Max	Min		Max
	B	241	448	441		758
	×42	290	496	414		758
	×46	317	524	434		758
	×52	359	531	455		758
	×56	386	544	490		758
	×60	414	565	517		758
	×65	448	600	531		758
	×70	483	621	565		758

Chemical Composition (%) of High Quality ERW Welded Steel Pipes

Standard	Grade	C	Mn	P	S	TI	CEV
Standard	Grade	Max	Max	Max	Max	Max	Max
API SPEC 5L	PSL1
	B	0.26	1.2	0.030	0.030	0.04	-
	×42	0.26	1.3	0.030	0.030	0.04
	×46,×52,×56，X60	0.26	1.4	0.030	0.030	0.04
	X65	0.26	1.45	0.030	0.030	0.06
	X70	0.26	1.65	0.030	0.030	0.06
	PSL2
	B	0.22	1.20	0.025	0.015	0.04	0.43
	×42	0.22	1.30	0.025	0.015	0.04
	×46,×52,×56, X60	0.22	1.40	0.025	0.015	0.04
	X65	0.22	1.45	0.025	0.015	0.06
	X70	0.22	1.65	0.025	0.015	0.06

Standard: GB/9711.1

Mechanical Properties of High Quality ERW Welded Steel Pipes

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(%) of High Quality ERW Welded Steel Pipes

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 of High Quality ERW Welded Steel Pipes

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 (%) of High Quality ERW Welded Steel Pipes

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 of High Quality ERW Welded Steel Pipes

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

Chemical Composition(%) of High Quality ERW Welded Steel Pipes

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

High Quality ERW Welded Steel Pipes

Q: Can steel pipes be used for chemical refineries?: Yes, steel pipes can be used for chemical refineries. Steel pipes are commonly used in chemical refineries due to their high strength, durability, and resistance to corrosion. The harsh environment of a chemical refinery, which involves exposure to corrosive chemicals and extreme temperatures, requires materials that can withstand these conditions. Steel pipes are able to handle these challenges and are often chosen for their ability to transport various fluids and gases safely and efficiently. Additionally, steel pipes can be welded, which allows for easy installation and maintenance in complex refinery systems. Overall, steel pipes are a suitable choice for chemical refineries due to their robustness, corrosion resistance, and compatibility with the demanding conditions of this industry.

Q: How are steel pipes protected during transportation and storage?: Steel pipes are typically protected during transportation and storage through various measures. These include using protective coatings like oil or paint to prevent corrosion, using proper packaging materials such as plastic caps or wrapping, securing them with straps or bands to prevent movement and damage, and storing them in covered or enclosed areas to shield them from environmental elements like moisture, sunlight, or extreme temperatures.

Q: How do steel pipes compare to other materials like PVC or copper?: Steel pipes are known for their exceptional strength and durability, making them suitable for various applications. Compared to materials like PVC or copper, steel pipes offer higher resistance to corrosion, fire, and extreme temperatures. They also have a longer lifespan and can withstand high pressure and heavy loads. However, steel pipes are generally more expensive and require regular maintenance to prevent rusting. PVC pipes, on the other hand, are more affordable, lightweight, and easy to install, but they are less durable and have lower temperature resistance. Copper pipes are known for their excellent heat conductivity and resistance to corrosion, but they are more expensive and can be prone to theft. Ultimately, the choice between steel, PVC, or copper pipes depends on the specific requirements of the project and the budget.

Q: How big is the seamless steel tube of DN50?: Domestic steel pipe diameter is generally divided into A series and B series, DN50 pipe diameter of 60mm and 57mm respectively, the wall thickness should be based on your design pressure, temperature, pipe material to calculate.

Q: What is the size of seamless steel tube DN150?: Seamless steel tube is generally used to indicate the outer diameter * wall thickness, DN150 seamless steel pipe GB wall thickness is 5mm. Wall thickness is a series of calculations based on your design, pressure, temperature, and pipe material.

Q: How do you calculate the buoyancy of submerged steel pipes?: In order to calculate the buoyancy of submerged steel pipes, one must take into account Archimedes' buoyancy principle. According to this principle, the force exerted on an object submerged in a fluid is equal to the weight of the fluid displaced by the object. To calculate the buoyant force, it is necessary to determine the volume of fluid displaced by the submerged steel pipe. This can be done by multiplying the cross-sectional area of the pipe by the length of the submerged portion. Next, it is important to ascertain the density of the fluid in which the steel pipe is submerged. This information can be obtained from the properties of the fluid or by referring to known values. Once the volume and density of the fluid have been determined, the weight of the fluid displaced by the submerged pipe can be calculated using the equation: weight = volume × density × acceleration due to gravity. Finally, the buoyant force can be calculated by multiplying the weight of the displaced fluid by the acceleration due to gravity. This will yield the upward force exerted on the submerged steel pipe by the fluid. When accurately calculating the buoyancy of submerged steel pipes, it is crucial to take into account additional factors, such as the weight of the pipe itself, any attached equipment or coatings, and the specific conditions of the fluid in which it is submerged.

Q: What is the difference between steel pipes and copper pipes?: Steel pipes and copper pipes differ in their material composition, durability, cost, and application. Steel pipes are made of an alloy of iron and carbon, providing them with high strength and resistance to corrosion. Copper pipes, on the other hand, are made solely of copper, which offers excellent heat conductivity and resistance to bacterial growth. While steel pipes are more durable and suitable for high-pressure applications, copper pipes are commonly used for plumbing systems due to their malleability, ease of installation, and ability to withstand extreme temperatures. Additionally, copper pipes tend to be more expensive than steel pipes.

Q: Are steel pipes resistant to earthquakes?: Steel pipes are generally considered to be more resistant to earthquakes compared to other materials such as concrete or PVC pipes. This is due to the inherent properties of steel, which include its high tensile strength and flexibility. During an earthquake, steel pipes can absorb and distribute the seismic energy more effectively, allowing them to better withstand the shaking and ground movements. Additionally, steel pipes have the ability to deform without rupturing or collapsing, minimizing the risk of structural failure. However, it is important to note that the earthquake resistance of steel pipes ultimately depends on various factors such as the design, installation, and overall structural integrity of the piping system. Proper engineering and construction practices should be followed to ensure the highest level of earthquake resistance for steel pipes.

Q: What quota is reserved for buried DN20 steel pipe?: If it is reserved for embedded pipe pre buried steel waterproof casing, set of waterproof casing steel production and installation is to set the quota items, if the outdoor installation of welded steel pipe buried steel casing pre quota items, if it is a reserved hole, then there is no need to set the quota items.

Q: What are the different types of steel pipe coatings for corrosive environments?: There are several types of steel pipe coatings specifically designed for corrosive environments. Some common options include fusion-bonded epoxy (FBE) coatings, liquid epoxy coatings, polyethylene (PE) coatings, and polyurethane (PU) coatings. These coatings provide a protective layer to prevent corrosion and extend the lifespan of the steel pipes in various corrosive conditions.

As the largest strip-steel production base in china, we can get the advantage of having the lowest goods transport cost. Our company covers an area of 80000 square meter, and transportation here is very convenient. We are mainly engaged in the manufacture and management of high frequency straight seam welded pipe. We now have 11 welded pipe production lines, with daily output of2800-3000 tons of welded pipe ranging from DN15--DN200 (1/2--8 inch),and the designed annual production capacity of 800,000 tons.

1. Manufacturer Overview

Location	Hebei,China
Year Established	2005
Annual Output Value	Above 100 Million RMB
Main Markets	Main land;Middle East;Southeast Asia
Company Certifications	ISO9001

2. Manufacturer Certificates

a) Certification Name
Range
Reference
Validity Period

3. Manufacturer Capability

a) Trade Capacity
Nearest Port	Tianjin；Qingdao
Export Percentage	41% - 50%
No.of Employees in Trade Department
Language Spoken:	English；Chinese；Korean
b) Factory Information
Factory Size:	120mu
No. of Production Lines	11
Contract Manufacturing	OEM Service Offered；Design Service Offered
Product Price Range	High Average