Seamless steel pipe

Seamless steel pipes are produced using an extrusion mold. Welded steel pipes are produced by rolling a sheet of steel into a tube and welding the seam. Seamless steel pipes are less expensive. The third method is casting. Molten steel is poured into a casting mold.

Please check more in-formations about seamless pipes and tubes as below:

Seamless Steel pipes by application >>

Steel pipe are ubiquitous and can be found underground and within residential walls, laboratories, and commercial and industrial structures. Seamless steel pipe transport fluids including water, natural gas, waste and air. Three manufacturing methods exist to produce steel pipes.

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ASTM Seamless pipes >>

The ASTM/ASME seamless steel pipes are extensively applied in petroleum, chemical, power, boiler, and machinery industries. Our prefect products and preferential price have won us customers' trust and consistently favorable comments.

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DIN Seamless steel pipe >>

DIN/EN seamless pipes are extensively applied in petroleum, chemical, power, boiler, and machinery industries. Our prefect products and preferential price have won us customers’ trust and consistently favorable comments.

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JIS Seamless pipes >>

JIS seamless pipe is steel pipe that has been created by JIS and meets certain performance requirements. Manufacturers follow Japan Industrial Standards voluntarily.

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Leading Big O.D. Steel seamless pipes supplier in Asia >>

Big OD seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Big OD seamless pipes dominates 65% of market share in Chinese boiler industry.

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API pipes & tubes >>

The American Petroleum Institute has several standard specifications for pipe. They set forth dimensions, materials, quality control during manufacture, minimum physical properties such as yield strength, etc.

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How to packing the seamless pipe >>

There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method to work prevent rusting and Sea transportation security.

We can makes and markets cold-drawn and hot rolled seamless steel pipes and cold-drawn special-section seamless pipes which are widely applied in the industries of petrochemical, boiler, automobile, mechanical, construction, chain, electric of the company is 80000t.

Inspection and Test:
Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.

Surface treatment:
Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting

JIS G3462 boiler tubes

JIS G3462 boiler tubes

boiler tube, boiler tubes, heat exchanger tubes, JIS G3462, JIS G3462 STB A12, JIS G3462 STB A13, JIS G3462 STB A24, Seamless pipe, Seamless Pipes, seamless steel tubes, Seamless tube, seamless tubes, steel tube

JIS G3462  is a JIS standard refers to alloy steel boiler tubes and heat exchanger tubes. This steel tubes is used in carbon steel pipes for tube heat-exchange inside and outside, such as boiler water steel pipe, superheater tube, condenser tube and more.
However, it is not applicable to the steel tubes for heating furnace and steel heat exchanger tubes for low temperature service.

The size range of  JIS G3462 boiler tubes(mm):

• Outer Dimensions: 19.05mm-168.3mm
• Wall Thickness:2.0mm-14 mm
• Length: max 19000mm

Application of JIS G346s seamless tubes:

• used for exchanging heat on the inside and outside of the tube, such as water tubes, smoke tubes, superherater tubes, air preheater tubes, etc. of boilers, and heat exchanger industries.
• it is not applicable to the steel tubes for heating furnace and those for heat exchangers for low temperature service.

The main products of steel / steel grade:

• JIS G3462 STB A12
• JIS G3462 STB A13
• JIS G3462 STB A24

Corresponding to international standards

• ISO 9329-2:1997 Seamless steel tubes for pressure purposes-Technical delivery conditions-Part 2: Unalloyed and alloyed steels with specified elevated temperature properties.
• ISO 9330-2:1997 Welded steel tubes for pressure purposes-Technical delivery conditions-Part 2: Electric resistance and induction welded unalloyed and alloyed steel tubes with specified elevated temperature properties.

Delivery Condition:

• Heat treatment,Annealed, Normalized, Normalized and Tempered

Surface treatment:

• Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting
• Painting as requested.

Chemical composition of JIS G3462 heat exchanger tubes(%):

Grade	C	Si	Mn	P	S	Cr	Mo
JIS G3462 STB A12	0.10~0.20	0.10~0.50	0.30~0.80	<0 td>	<0 td>	—	0.45~0.65
JIS G3462 STB A13	0.15~0.25	0.10~0.50	0.30~0.80	<0 td>	<0 td>	—	0.45~0.65
JIS G3462 STB A24	<0 td>	<0 td>	0.30~0.60	<0 td>	<0 td>	1.90~2.60	0.87~1.10

Mechanical behavior of JIS G3462 heat exchanger tubes (%):

Grade	tensile strength kgf/mm²{N/mm²}	yield strength kgf/mm²{N/mm²}
JIS G3462 STB A12	<39{382}	<21{206}
JIS G3462 STB A13	<42{412}	<21{206}
JIS G3462 STB A24	<42{412}	<21{206}

Tolerance on Outside Diameter in JIS G3462

O.D.	TOLERANCE ON OUTSIDE DIAMETER
	HOT ROLLED SEAMLESS PIPES	SEAMLESS PIPES THROUGH QUENCH AND NORMALIZED	COLD DRAWN SEAMLESS PIPES THRONG, THE HOT TREATMENT EXCEPT QUENCH AND NORMALIZED	ELECTRIC WELDED PIPES EXCEPT COLD DRAWN	COLD DRAWN ELECTRIC WELDED PIPES
MM
< td>	+0.4 -0.8	±0.25	±0.10	±0.15	±0.10
<25.40		±0.25	±0.15	±0.20	±0.15
<40-50		±0.25	±0.20	±0.25	±0.20
<50.60		±0.25	±0.25	±0.30	±0.25
<60-80		±0.30	±0.30	±0.40	±0.30
<80.100		±0.40	±0.40	-0.60,+0.40	±0.40
<100-120	+0.4 -1.2	-0.60,+0.40	-0.60,+0.40	-0.80,+0.40	-0.60,+0.40
<120-160		-0.80,+0.40	-0.80,+0.40	-1.00,+0.40	-0.80,+0.40
<160-200	-1.8,+0.4	-1.20,+0.40	-1.20,+0.40	-1.20,+0.40	-1.20,+0.40
<200	-2.4,+0.4	-1.60,+0.40	-1.60,+0.40	-1.60,+0.40	-1.60,+0.40

Tolerance on Wall Thickness in JIS G3462

WALL THICKNESS (MM)	HOT ROLLED SEAMLESS PIPE		COLD DRAWN SEAMLESS PIPE		ELECTRIC WELDED PIPE
	O.D（MM）		O.D（MM）		O.D（MM）
	< td>	<100	< td>	<40	< td>	<40
	(%)
< td>	-	-	-0,+0.4mm	+22 -0	-0,+0.3mm	+18 0
<2-2.4	-0,+40	-	+20 -,0		+18 -0
<2.4-3.8	-0,+35	-0,+35
<3.8-4.6	-0,+23	-0,+33
<4.6	-0,+28	-0,+28

Tolerance on the Length in JIS G3462

ITEM		TOLERANCE AN LENGTH
OD<50mm td>	<7m td>	-0, +7mm
	<=7m	Every 3m increase in length, the plus tolerance be increased by 3mm with a maximum of 15mm
OD<=50mm	<7m td>	-0, +10mm
	<=7m	Every 3m increase in length, the plus tolerance be increased by 3mm with a maximum of 15mm
OD: Outside Diameter

JIS G3456 Seamless tubes for high pressure service

JIS G3456 Carbon steel pipes, Seamless pipes for high temperature service at a temperature over 350 Degrees celsius.

carbon steel pipe, carbon steel pipes, JIS G3456, JIS G3456 STPT370, JIS G3456 STPT410, JIS G3456 STPT480, Seamless pipe, Seamless Pipes, Steel pipe

Standard:

JIS G 3456:2010

JIS, Japanese Industrial Standards specifies the standards used for industrial activities in Japan.

Size range of JIS G3456(mm):

• Outer Dimensions: 19.05mm- 114.3mm
• Wall Thickness:2.0mm -14 mm
• Length: max 16000mm

Application:

• Carbon steel pipes for pressure service
• High pressure service and high temperature service at  a temperature over 350 Degrees celsius

Packing:

• Be packed in Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements .
• Surface: Varnish coating
• Ends: Beveled or Plain ends with Plastic caps
• Painting: as requested.

Inspection & Certification:

1) Certification: ISO, API, ASTM, DIN etc.
2) Mill Test Certificate: EN10204/3.1B
3) Third party inspection: SGS, BV, Lloyds etc.

The main products of steel / steel grade:

• JIS G3456 STPT370
• JIS G3456 STPT410
• JIS G3456 STPT480

Chemical Compositions(%) of JIS G3456

Standard/ Grade	C	Si	Mn	P	S
JIS G3456 STPT370	≤0.25	0.10-0.35	0.30-0.90	≤0.035	≤0.035
JIS G3456 STPT410	≤0.30	0.10-0.35	0.30-1.00	≤0.035	≤0.035
JIS G3456 STPT480	≤0.33	0.10-0.35	0.30-1.00	≤0.035	≤0.035

Mechanical Properties of JIS G3456

Standard/ Grade	Yield Strength (Mpa)	Tensile Strength (Mpa)	Elongation (%)
JIS G3456 STPT370	≥216	≥370	≥30
JIS G3456 STPT410	≥245	≥410	≥25
JIS G3456 STPT480	≥275	≥480	≥25

Tolerance on Outside Diameter and Wall Thickness in JIS G3456

APPLICATION	TOLERANCE ON OUTSIDE DIAMETER		TOLERANCE ON WALL THICKNESS
Hot Rolled Seamless Pipes	< mmspan>	±0.5mm	< mmspan>	±0.5mm
	<50-160mm	±1%
	<160-200mm	±1.6mm	<4mm	±12.5%
	<200mm	±0.8%
	More that 350mm, the Tolerance is ±0.5%
Cold Drawn Seamless Pipes and Electric Resistant Welded Pipes	< mmspan>	±0.3mm	< mmspan>	±0.2mm
	<40mm	±0.8%	<2mm	±10%
	More than 350 mm the Tolerance is ±0.5%

Seamless Pipes and Tubes for Pressure Applications

Seamless Pipes and Tubes for Pressure Applications

Seamless Pipes and Tubes for Pressure Applications

EN 10216-1, EN 10216-2, PIPE, Seamless Pipes, Seamless tube

The EN 10216 Euronorm replaces the old DIN 17175 and DIN 1629standards. This standard is designed for pipes used in pressure applications, such as a pipeline. This is why the associated steel qualities are designated by the letter P for Pressure. The value that follows this letter designates the minimum yield strength. The subsequent letter designations provide additional information.

THE EN 10216 COMPRISES SEVERAL PARTS. THE PARTS THAT ARE RELEVANT TO US ARE AS FOLLOWS:

• EN 10216 Part 1: non-alloy pipes with specified properties at room temperature
• EN 10216 Part 2: non-alloy pipes with specified properties at higher temperatures
• EN 10216 Part 3: alloy pipes made from fine-grained steel for any temperature

We are one of the professional China manufacturers work at EN 10216-1(EN 10216-1 steel tubing).

This part of EN10216 may also be applied for tubes of non-circular cross section; necessary modification should be agreed a time of enquiry and order.

Some examples:

EN 10216-1, QUALITY P235TR2 (FORMERLY DIN 1629, ST.37.0)

• P = Pressure
• 235 = minimum yield strength in N/mm2
• TR2 = quality with specified properties relating to aluminum content, impact values and inspection and test requirements. (In contrast to TR1, for which this is not specified).

EN 10216-2, QUALITY P235 GH (FORMERLY DIN 17175, ST.35.8 CL. 1, BOILER PIPE)

• P = Pressure
• 235 = minimum yield strength in N/mm2
• GH = tested properties at higher temperatures

EN 10216-3, QUALITY P355 N (MORE OR LESS EQUIVALENT TO DIN 1629, ST.52.0)

• P = Pressure
• 355 = minimum yield strength in N/mm2
• N = normalized*

* Normalized is defined as: normalized (warm) rolled or standard annealing (at a min temperature of 930°C). This applies to allqualities designated by the letter N in the new Euro Standards.

Pipes: the following standards are replaced by DIN EN

PIPES FOR PRESSURE APPLICATIONS OLD STANDARD

Execution	Norm	Steel grade
Welded	DIN 1626	St.37.0
Welded	DIN 1626	St.52.2
Seamless	DIN 1629	St.37.0
Seamless	DIN 1629	St.52.2
Seamless	DIN 17175	St.35.8/1
Seamless	ASTM A106*	Grade B
Seamless	ASTM A333*	Grade 6

PIPES FOR PRESSURE APPLICATIONS NEW STANDARD

Execution	Norm	Steel grade
Welded	DIN EN 10217-1	P235TR2
Welded	DIN EN 10217-3	P355N
Seamless	DIN EN 10216-1	P235TR2
Seamless	DIN EN 10216-3	P355N
Seamless	DIN EN 10216-2	P235GH
Seamless	DIN EN 10216-2	P265GH
Seamless	DIN EN 10216-4	P265NL

* ASTM standards will remain valid and will not be replaced by Euronorms in the near future

Seamless pipes Specifications and Execution Standard

Seamless pipes Specifications and Execution Standard

We can makes and markets cold-drawn and hot rolled seamless steel pipes and cold-drawn special-section seamless pipes which are widely applied in the industries of petrochemical, boiler, automobile, mechanical, construction.

Boiler tubes

Tubes for Fluid

We can makes and markets cold-drawn and hot rolled seamless steel pipes and cold-drawn special-section seamless pipes which are widely applied in the industries of petrochemical, boiler, automobile, mechanical, construction, chain, electric of the company is 80000t. Our factories through ISO9001:2000 certificate, has aggressive leadships and outstanding professionals.

Specifications:

Size: (6 - 680) x (0.5 - 87) mm, but we can also produce other specification according to the customers requirements.

Categorg	Material	Standards	Dimension range	Application
seamless steel pipe	10#, 20#, 35#, 45#, 16Mn 27SiMn	GB8162-1999 GB8163-1999 GB3087-1999 GB5310-1995 ST45.8, Ⅲ GB6479-1986 GB9948-1988 GB5312-1999	O.D.6-824×2-100
Structural pipe	20, 35, 45	GB/T8162-1999	O.D.6-610×1.5-40	General structure application
Liquid pipe	20	GB/T8163-1999	O.D.8-610×1.5-40	fluid transportation application
Low and medium pressure boiler pipe	20	GB3087-1999	O.D.10-426×2-40	Low-medium pressure boiler of superheater tube, boiling water pipes, size of locomotive tobacco pipe
seamless steel pipe	Gr5Mo(P5, STFA25, T5, ) 15GrMo(P11, P12, STFA22) 13GrMo44 12Gr1MoV P22(10GrMo910) T91, P91, P9, T9 WB36	GB5310-1995 GB9948-1988 ASTMA335/A335m ASTMA213/A213m DIN17175-79 JISG3467-88 JISG3458-88	O.D.16-824×2-100	Petroleum, chemical, electric power, high temperature, low temperature resistant and corrosion-resistant seamless steel pipes in boiler industry.
Oil cracking tube	20 12Gr1MoV 15GrMo	GB9948-88	O.D.10-530×1.5-60	used for petroleum refining plant of furnace tubes, heat exchange tubes, seamless pipe furnace tubes, heat exchange tubes, seamless pipe
High Pressure Boiler Tube	20G, SA106c ST45.8/3	GB5310-95 ASTMA106-99 DIN17175-79	O.D.16-824×2-65	Heat-resistant high-pressure boiler seamless steel pipe
16Mn seamless steel pipe	16Mn	GB8162	O.D.22-630×2-30
Hydraulic prop tube	27SiMn	GB/T17396-1998	O.D.70-377×12-40	Hydraulic bracket
chemical fertilizer equipment tube	20, 16Mn, Q345	GB6479-2000	O.D.25-426×6-40	Fertilizer equipment, pipeline

JIS Number and Corrensponding Foreign Standards

JIS

ASTM

BS

DIN

NF

ISO

Index Number

Std.No

Grade

Type

Std.No

Grade

Type

Std.No

Grade

Type

Std.No

Grade

Type

Std.No

Grade

Type

Std.No

Grade

Type

G3456

STPT370 (STPT38)

C

A106

GrA

C

3602

HFS360

C

17175

St35.8

C

A49-211

TU37b

C

2604/2

TS5

C

C004

"

CFS360

C

17177

St37.8

C

A49-213

TU37c

C

2604/3

TW9H

C

"

ERW360

C

A49-243

TU37c

C

"

CEW360

C

STPT410 (STPT42)

C

A106

GrB

C

3602

HFS410

C

17175

St45.8

C

A49-211

TU42b

C

2604/2

TS9H

C

"

CFS410

C

17177

St42.8

C

A49-213

TU42c

C

"

ERW410

C

A49-243

TU42c

C

"

CEEW410

C

STPT480 (STPT42)

C

A106

GrC

C

3602

HFS460

C

A49-211

TU48b

C

2604/2

TS14

C

"

CFS460

C

A49-213

TU48c

C

"

ERW460

C

"

CEEW460

C