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

DIN 2448 seamless steel pipes

DIN 2448 seamless steel pipes

DIN 2448 seamless steel pipes

DIN 2448, seamless steel pipe, seamless steel pipes, St 37.0, Steel pipe

DIN 2448 Seamless Steel Pipes and Tubes-Dimensions, Conventional Masses per Unit Lengthstandard reference.

Standard:

• DIN 1629
• DIN 17175

Material

• St 37.0
• St35.8I

Schedule: Sch10,sch20, Sch40, Std, Sch80, Xs

Length: 5.8 Meters For 20ft Container, 6-12 Meters For 40ft Container

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.

Packing:

• Packed in wooden crates, wrapped in plastic, and suitably protected for sea-worthly delivery or as requested.
• Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

Delivery:

• Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.
• Weight of bundle-up to 5000 kg upon request of customer.
• Each bundle is furnished with three tags.

Seamless steel pipes for project service

Seamless steel pipes for project service

Seamless steel pipe for low and medium pressure

API 5L, ASTM A53, seamless steel pipe, seamless steel pipes, Steel pipe

Sunny Steel offer the seamless steel pipes used for project service include coneying water, pertroleum, gas and other common fluides.

Seamless 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. Seamless steel pipes are produced using an extrusion mold.

Steel pipes Size (mm):

• Outer Dimensions.: 10.3mm-114.3mm
• Wall Thickness: 0.8 mm-12 mm
• Length: max 16000mm

Application: apply to coneying water, pertroleum, gas and other common fluides.

Steel grade:

• ASTM A106 Grade A, Grade B, Grade C
• ASTM A53
• API 5L Gr.B
• Mill test certificates will be issued according to EN10204/3.1B

Well packing:

• Packed in wooden crates, wrapped in plastic, and suitably protected for sea-worthly delivery or as requested.
• Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

Seamless steel pipe for low and medium pressure

Seamless steel pipe for low and medium pressure

Seamless steel pipe for low and medium pressure

astm a179, ASTM A192, GB3087, pipeline, seamless steel pipe, seamless steel pipes

Sunny Steel offer an extensive range of Seamless steel pipes for  for low and medium pressure boiler water wall, economizer, reheater, superheater and steam pipeline.

Steel pipes Size (mm):

• Outer Dimensions.: 10.3mm-114.3mm
• Wall Thickness: 0.8 mm-12 mm
• Length: max 16000mm

Application:

• for low and medium pressure boiler water wall
• economizer, reheater, superheater and steam pipeline.

Steel grade:

•  ASTM A179,  ASTM A192
• Mill test certificates will be issued according to EN10204/3.1B

Well packing:

• Packed in wooden crates, wrapped in plastic, and suitably protected for sea-worthly delivery or as requested.
• Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

Chemical Compositions(%)

Steel grade	C	Si	Mn	P	S	Cr	Mo	Cu	Ni	V
ASTM A179	0.06-0.18	/	0.27-0.63	≤0.035	≤0.035	/	/	/	/	/
ASTM A192	0.06-0.18	≤0.25	0.27-0.63	≤0.035	≤0.035	/	/	/	/	/

Mechanical Properties

Steel grade	Yield Strength (Mpa)	Tensile Strength (Mpa)	Elongation (%)	Hardness
				<5 td>	<=5.1
ASTM A179	≥180	≥325	≥35	/	/
ASTM A192	≥180	≥325	≥35	77HRB	137HB

ASTM A335 P5 Alloy Seamless Steel Pipes

ASTM A335 P5 Alloy Seamless Steel Pipes

ASTM A335, ASTM A335 P5, ASTM A335 P5 alloy pipe, seamless steel pipes, steel pipes

Each length of pipe shall be subjected to the hydrostatic test. Also, each pipe shall be examined by a non-destructive examination method in accordance to the required practices.

The different mechanical test requirements for pipes, namely, transverse or longitudinal tension test, flattening test, and hardness or bend test are presented.Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

Material & Manufacture

Pipe may be either hot finished or cold drawn with the finishing heat treatment noted below.

Heat Treatment

• A / N+T
• N+T / Q+T
• N+T

Mechanical Tests Specified

• Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test
• For material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot. For small lots, at least one pipe shall be tested.
• For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipe.

Notes for Bend Test:

• For pipe whose diameter exceeds NPS 25 and whose diameter to wall thickness ratio is 7.0 or less shall be subjected to the bend test instead of the flattening test.
• Other pipe whose diameter equals or exceeds NPS 10 may be given the bend test in place of the flattening test subject to the approval of the purchaser.
• The bend test specimens shall be bent at room temperature through 180 without cracking on the outside of the bent portion.

Chemical Requirements of ASTM A335 P5

UNS Designa-tion	K41545
Carbon(max)	0.15
Manganese	0.30-0.60
P&S(max)	0.025
Silicon(max)	0.50
Chromium	4.00-6.00
Molybdenum	0.45-0.65
Others	—

Mechanical Properties  of ASTM A335 P5

Tensile strength, min, (MPa)	415
Yield strength, min, (MPa)	205
Elongation, min, (%), L/T	30/20