products

HOT PRODUCTS

  • Q345D Square Steel Pipe
  • U type finned tube
  • Carbon Steel Seamless Pipe

News

Location : home > News

CARBON STEEL SEAMLESS PIPE

Posted on 2020/05/28
Carbon steel seamless pipe

Carbon steel seamless pipe are fabricated by piercing a long hot-white ingot and carbon steel material can be divided into three further categories.
including: mild carbon, medium carbon and high carbon.


The wall thickness of Carbon steel seamless pipe



Tolerance of Outer Diameter and Wall thickness



Specification


Standard Description
ASTM A179/A179M Seamless cold drawn low alloy steel heat exchanger and condenser tubes.
API 5L Line pipe.
ASTM A53M Black & Zinc Coated Welded and Seamless Steel Pipe.
ASTM A106M Seamless carbon steel pipe for high temperature service.
ASTM A105M Carbon steel forgings for piping applications.
ASTM A234M Piping fittings of wrought carbon steel and alloy steel for moderate and high temperature service.
ASTM 3799 Steel pipe fittings, screwed and socket weldability for the petroleum industry.
AS 1163 Structural steel hollow sections
AS 1074 Steel tubes and tubulars for ordinary service
BS13872 Screwed and socketed steel tube and tubulars

Standard

Standard

Type of pipe

Class

Grade

API SPEC 5L

ISO 3183

SMLS

PLS1

L245B, L290 X42, L320 X46 , L360 X52,

L390 X56, L415 X60, L450 X65, L485 X70

PLS2

L245N BN, L290N X42N, L320N X46N,

L360N X52N, L390N X56N, L415N X60N,

L360Q X52Q, L390Q X56Q, L415Q X60Q , L485Q X70Q

PLS2 Sour Environment

L245NS BNS, L290NS X42NS, L320NS X46NS

L360NS X52NS, L390NS X56NS, L415NS X60NS,

L360QS X52QS, L390QS X56QS, L415QS X60QS L485QS X70QS

WELD

PLS1

L245B, L290 X42, L320 X46, L360 X52

L390 X56, L415 X60, L450 X65, L485 X70

PLS2

L245M BM, L290M X42M, L320M X46M,

L360M X52M, L390M X56M, L415M X60M,

L450M X65M, L485M X70M, L555M X80M,

Standard

Grade

ASTM A 53 M

A , B

ASTM A 106M

A, B, C

JIS G 3454

STPG 370, STPG 410

JIS G 3455

STPG370, STPG410, STPG480

JIS G 3456

STPG370, STPG410, STPG480

Grade: Chemical Composition (%):

Standard

Grade

C

Si

Mn

P

S

Ni

Cr

Cu

Mo

V

ASTMA

53M

A

≤0.25

-

≤0.95

≤0.05

≤0.045

≤0.40

≤0.40

≤0.40

≤0.15

≤0.08

B

≤0.30

-

≤1.20

≤0.05

≤0.045

≤0.40

≤0.40

≤0.40

≤0.15

≤0.08

ASTM A 106M

A

≤0.25

≥0.10

0.27-0.93

≤0.035

≤0.035

≤0.40

≤0.40

≤0.40

≤0.15

≤0.08

B

≤0.30

≥0.10

0.29-1.06

≤0.035

≤0.035

≤0.40

≤0.40

≤0.40

≤0.15

≤0.08

C

≤0.35

≥0.10

0.29-1.06

≤0.035

≤0.035

≤0.40

≤0.40

≤0.40

≤0.15

≤0.08

JIS G 3454

STPG 370

≤0.25

≤0.35

0.30-0.90

≤0.040

≤0.040

-

-

-

-

-

STPG 410

≤0.30

≤0.35

0.30-1.00

≤0.040

≤0.040

-

-

-

-

-

JIS G 3455

STS 370

≤0.25

0.10-0.35

0.30-1.10

≤0.035

≤0.035

-

-

-

-

-

STS 410

≤0.30

0.10-0.35

0.30-1.40

≤0.035

≤0.035

-

-

-

-

-

STS 480

≤0.33

0.10-0.35

0.30-1.50

≤0.035

≤0.035

-

-

-

-

-

JIS G 3456

STPT 370

≤0.25

0.10-0.35

0.30-0.90

≤0.035

≤0.035

-

-

-

-

-

STPT 410

≤0.30

0.10-0.35

0.30-1.00

≤0.035

≤0.035

-

-

-

-

-

STPT 480

≤0.33

0.10-0.35

0.30-1.00

≤0.035

≤0.035

-

-

-

-

-

Painting & Coating



Surface treatment of Carbon steel seamless pipe: In order to improve the service life of oil pipeline, surface treatment is usually carried out to facilitate the firm combination of Carbon steel seamless pipe and anticorrosive coating.Common processing methods are: cleaning, tool derusting, pickling, shot blasting derusting four categories. 1 cleaningGrease, dust, lubricant, organic matter adhered on the surface of Carbon steel seamless pipe, usually using solvent, emulsion to clean the surface.However, the rust, oxide skin and welding slag on the surface of the Carbon steel seamless pipe cannot be removed, so other treatment methods are needed.Tool rust removalCarbon steel seamless pipe surface oxide, rust, welding slag, can use steel wire brush to clean and polish the surface treatment.Tool derusting can be divided into manual and power, manual tool derusting can reach Sa 2 level, power tool derusting can reach Sa3 level.If the surface of Carbon steel seamless pipe is attached with a particularly strong oxide skin, it may be impossible to remove the rust with the help of tools, so we need to find other ways. 3 pickling Common pickling methods include chemistry and electrolysis.But only chemical pickling is used for pipeline corrosion protection.Chemical pickling can achieve a certain degree of cleanliness and roughness on the surface of Carbon steel seamless pipe, which is convenient for subsequent anchor lines.Usually as a shot (sand) after reprocessing. 4 shot blasting for rust removalBy high power motor drive the high-speed rotating blades, steel grit, steel shot, segment, minerals and other abrasive wire under the action of centrifugal force on Carbon steel seamless pipe surface spray and mass ejection, thoroughly remove rust, oxides and dirt on one hand, on the other hand, Carbon steel seamless pipe under the action of abrasive violent impact and friction force, to achieve the required uniform roughness.Among the four treatment methods, shot blasting and derusting is an ideal treatment method for pipe derusting. Generally, shot blasting and derusting are mainly used for inner surface treatment of Carbon steel seamless pipe, and shot blasting and derusting are mainly used for outer surface treatment of Carbon steel seamless pipe.


how to contact us?

links

Cangzhou Datang Steel Pipe Co., Ltd All Right Resevered.