ERW Steel Pipe & ERW Casing

Sizes:

OD (Out Diameter): 21.3-660mm
WT (Wall Thickness): 1.0-20mm or sch5, sch10, sch40, sch80, st, xs

Standard:

For ERW pipe

ASTM A53 GR.B, ASTM A135, ASTM A178, ASTM A252

API 5L X42/46/52/56/60/70

ASTM A500, ASTM A513, ASTM A36

EN 10204/10217 S235JR,S275JR, S355,S355JR,S355J2H

For EFW pipe

Carbon steel efw pipe: ASTM A671, ASTM A672

Stainless steel erw pipe: ASTM A312

Alloy steel efw pipe: ASTM A691

Coating

3PE Coating

3PP Coating

FBE Coating

Epoxy Coating

Special Painting

Uses:

For ERW Line Pipe

For ERW Casing

For ERW Structure Tube

For High pressure and High temperature

ERW Pipe

Tolerance of Outside Diameter

Standard	Out Diameter	Tolerance of Pipe End	Tolerance of Pipe Body
API 5L	219.1～273.1	+1.6mm, -0.4mm	±0.75%
	274.0～320	+2.4mm, -0.8mm	±0.75%
	323.9～457	+2.4mm, -0.8mm	±0.75%
	508	+2.4mm, -0.8mm	±0.75%
	559～610	+2.4mm, -0.8mm	±0.75%

Tolerance of Wall Thickness

Standard	Grade	Out Diameter	Wall Thickness
API 5L	A	219.1～457	+15%, -12.5%
	B	508～610	+17.5%, -12.5%
	X42-X80	508～610	+19.5%, -8%

Chemical Analysis and Mechanical Properties

Standard	Class	Grade	Chemical Analysis(%)				Mechanical Properties(min)(Mpa)
Standard	Class	Grade	C	Mn	P	S	Tensile Strength	Yield Strength
API 5L	PSL1	B	0.26	1.20	0.030	0.030	414	241
		X42	0.26	1.30	0.030	0.030	414	290
		X46	0.26	1.40	0.030	0.030	434	317
		X52	0.26	1.40	0.030	0.030	455	359
		X56	0.26	1.40	0.030	0.030	490	386
		X60	0.26	1.40	0.030	0.030	517	414
		X65	0.26	1.45	0.030	0.030	531	448
		X70	0.26	1.65	0.030	0.030	565	483
	PSL2	B	0.22	1.20	0.025	0.015	414	241
		X42	0.22	1.30	0.025	0.015	414	290
		X46	0.22	1.40	0.025	0.015	434	317
		X52	0.22	1.40	0.025	0.015	455	359
		X56	0.22	1.40	0.025	0.015	490	386
		X60	0.22	1.40	0.025	0.015	517	414
		X65	0.22	1.45	0.025	0.015	531	448
		X70	0.22	1.65	0.025	0.015	565	483
		X80	0.22	1.85	0.025	0.015	621	552

ERW Pipe Manufacturing Process:

High-frequency straight seam electric-resistance welded steel pipe(erw steel pipe) is hot-rolled coil after forming machine, the use of high-frequency current skin effect and proximity effects, the tube edge heating and melting, squeeze roller under pressure welding to achieve production.

High-frequency resistance welding steel pipe, welding pipe and ordinary welding process is not the same, the weld is made of the base metal melt from the body, the mechanical strength is better than the general pipe. Smooth appearance, high precision, low cost weld high and small, favorable 3PE anti-corrosion coating. There are significant differences in the welding methods between high frequency welded pipe and submerged arc welded pipe. As the welding is done instantly at high speed, the difficulty of ensuring the quality of welding is much higher than that of submerged arc welding.

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Size	USA	Europe	Others
XS	28-30	27-29	34-36
S	30-32	29-31	36-38
M	32-33	31-33	38-40
L	33-34	33-36	40-44
XL	34-38	36-40	44-48
XXL	38-48	40-44	48-50

FAQ

What payment methods do you accept?
We accept various payment methods, including credit/debit cards, PayPal, and bank transfers for your convenience.
Do you offer international shipping?
Yes, we offer international shipping to many countries. Please check our shipping information page for details on available destinations and shipping rates.
How can I track my order?
Once your order is shipped, you will receive a tracking number via email. You can use this number to track your package's delivery status on our website or through the courier's tracking portal.
What is your return policy?
We offer a hassle-free return policy. If you're not satisfied with your purchase for any reason, you can return it within 30 days for a full refund or exchange. Please refer to our returns page for detailed instructions.
Are your products covered by a warranty?
Yes, most of our products come with a manufacturer's warranty against defects in materials and workmanship. The duration and terms of the warranty vary by product, so please check the product description or contact our customer support team for specific details.

Shipping & Delivery

All estimated shipping times are in addition to fulfillment times, We offer a next working day delivery for orders placed before 6:30 p.m. Monday to Friday. Orders placed after this will be delivered within two working days. This excludes Saturday, Sunday and holidays. Appointed is not responsible for any customs/duties related to international orders. We are unable to calculate charges prior to your order being delivered, and recommend checking with your local customs office for more information. Shipping fees will not be refunded if you refuse these charges.

Free destination delivery above $100
Europe 1 – 3 days Free
United States 4 – 6 days Free
Asia 3 – 6 days Free
Africa 5 – 7 days Free
Australia 3 – 5 days Free

Returns & Refunds

We have a 14-day return policy, which means you have 14 days after receiving your item to request a return, To be eligible for a return, your item must be in the same condition that you received it, unused, and in its original packaging. You’ll also need the order confirmation, order number, or proof of purchase. We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

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