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Product introduction

This specification covers wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. The pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation. All seamless and welded pipes shall be treated to control their micro-structure. Tensile tests, impact tests, hydro-static tests, and nondestructive electric tests shall be made in accordance to specified requirements.
1. Scope
1.1 This specification covers nominal (average) wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. Several grades of ferric steel are included as listed in Table 1. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse affect on low-temperature impact properties.
1.2 Supplementary Requirement S1 of an optional nature is provided. This shall apply only when specified by the purchaser.
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in non-conformance with the specification. The inch-pound units shall apply unless the "M" designation of this specification is specified in the order.

Seamless steel pipes are made without welding seams, providing superior strength, durability, and resistance to high pressure. These pipes are ideal for applications in industries such as oil and gas, construction, and aerospace, where high-performance and reliability are crucial. They withstand extreme conditions like high temperatures and corrosive environments, ensuring long-term performance and safety.

Technical data

Seamless Steel Pipe Chemical Composition and Mechanical Properties

This data is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

Standard	Grade	Chemical Composition (%)					Mechanical Properties
ASTM A53	Grade	C	Si	Mn	P	S	Tensile STrength(Mpa)	Yield STrength(Mpa)
	A	≤0.25	-	≤0.95	≤0.05	≤0.06	≥330	≥205
	B	≤0.30	-	≤1.2	≤0.05	≤0.06	≥415	≥240
ASTM A106	A	≤0.30	≥0.10	0.29-1.06	≤0.035	≤0.035	≥415	≥240
ASTM A106	B	≤0.35	≥0.10	0.29-1.06	≤0.035	≤0.035	≥485	≥275
ASTM A179	A179	0.06-0.18	-	0.27-0.63	≤0.035	≤0.035	≥325	≥180
ASTM A192	A192	0.06-0.18	≤0.25	0.27-0.63	≤0.035	≤0.035	≥325	≥180
API 5L PSL1	A	0.22	-	0.90	0.030	0.030	≥331	≥207
	B	0.28	-	1.20	0.030	0.030	≥414	≥241
	X42	0.28	-	1.30	0.030	0.030	≥414	≥290
	X46	0.28	-	1.40	0.030	0.030	≥434	≥317
	X52	0.28	-	1.40	0.030	0.030	≥455	≥359
	X56	0.28	-	1.40	0.030	0.030	≥490	≥386
	X60	0.28	-	1.40	0.030	0.030	≥517	≥448
	X65	0.28	-	1.40	0.030	0.030	≥531	≥448
	X70	0.28	-	1.40	0.030	0.030	≥565	≥483
API 5L PSL2	B	0.24	-	1.20	0.025	0.015	≥414	≥241
	X42	0.24	-	1.30	0.025	0.015	≥414	≥290
	X46	0.24	-	1.40	0.025	0.015	≥434	≥317
	X52	0.24	-	1.40	0.025	0.015	≥455	≥359
	X56	0.24	-	1.40	0.025	0.015	≥490	≥386
	X60	0.24	-	1.40	0.025	0.015	≥517	≥414
	X65	0.24	-	1.40	0.025	0.015	≥531	≥448
	X70	0.24	-	1.40	0.025	0.015	≥565	≥483
	X80	0.24	-	1.40	0.025	0.015	≥621	≥552

Carbon Steel Seamless Pipe Chemical Composition and Mechanical Properties

Standard

Grade

Chemical Composition

Mechanical Properties

Tensile Strength(Mpa)

Yield Strength(Mpa)

Elongation(%)

GB/T8163

0.07-0.14

0.17-0.37

0.35-0.65

≤0.035

≤0.15

≤0.25

335-457

≥205

≥24

0.17-0.24

0.17-0.37

0.35-0.65

≤0.035

≤0.25

410-550

≥245

≥20

Q345

0.12-0.20

0.20-0.55

1.20-1.60

≤0.045

490-665

≥325

≥21

Carbon Steel Seamless Pipe Tolerance

Pipe types	Pipe Szie(mm)		Tolerances
Hot rolled	OD	All	±1% (min ±0.50mm)
Hot rolled	WT	All	+15%, -12.5%
Cold drawn	OD	6～10	±0.20mm
		10～30	±0.40mm
		30～50	±0.45mm
		>50	±1%
	WT	≤1	±0.15mm
		>1～3	+15% -10%
		>3	+12.5% -10%

Seamless Steel Pipe End

Plain End	Wall Thickness less than 0.5 inch, including SCH STD & SCH XS
Plain End (Square Cut)	Wall Thickness over 0.5 inch, including SCH XXS
Beveled End	Wall Thickness less than 0.5 inch, including SCH STD & SCH XS
Couplings	Outside Diameter equal or less than 2''
Thread Protection	Outside Diameter over 4 inch

FACTORY

APPLICATION AREAS

FAQ

How many countries have you exported? do you have service there?

We have exported to more than 75 countries. Please contact us to get the local service.Moreover, as we progress, we are confident that we can achieve even greater accomplishments.

Could we be your agent in our country?

Yes, we are looking for worldwide agents now.We too wish to join hands in pursuing mutual development, thereby achieving a synergistic effect where the whole is greater than the sum of its parts.

What certificates do you have?

We have certificates of CE,ISO9001 .

Where is your company? Where is the loading port?

Our company is situated in Tai'an City, Shandong Province. The nearest ports to us are Qingdao Port and Tianjin Port, both of which can be reached within the same day.

Are you manufacturer?

Yes, we are a manufacturing facility specialising in the production of steel pipes, screw piles and similar products, employing processes such as welding, stamping and cutting.

Seamless Pipe