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Seamless Steel Pipe

Keywords: Seamless Pipe, Seamless Carbon Steel Pipe, Carbon Steel Seamless Pipe
Size: OD: 1/8'' ~ 48'' (10.3 ~ 1219mm);WT: SCH 10 ~ 160, SCH STD, SCH XS, SCH XXS ; LENGTH: Fixed Length (5.8/6/11.8/12mtr), SRL, DRL
Standard & Grade: ASTM A106, Grade A/B/C
Ends: Square Ends/Plain Ends (straight cut, saw cut, torch cut), Beveled/Threaded Ends
Delivery: Within 30 days and Depends on your order quantity
Payment: TT, LC , OA , D/P
Packing: Bundled/In Bulk, Plastic Caps Plugged, Waterproof Paper Wrapped
Usage: Used for low pressure liquid delivery, such as water, gas, and oil
Availability:
Inquire

Seamless Steel Pipe Manufacturing Process 

Mandrel Mill Process

In the Mandrel Mill Process, a solid round (billet) is used. It is heated in a rotary hearth heating furnace and then pierced by a piercer. The pierced billet or hollow shell is rolled by a mandrel mill to reduce the outside diameter and wall thickness which forms a multiple length mother tube. The mother tube is reheated and further reduced to specified dimensions by the stretch reducer. The tube is then cooled, cut, straightened and subjected to finishing and inspection processes before shipment.


Manner man plug mill process

In the Plug Mill Process, a solid round (billet) is used. It is uniformly heated in the rotary hearth heating furnace and then pierced by a Manner man pieces. The pierced billet or hollow shell is roll reduced in outside diameter and wall thickness. The rolled tube simultaneously burnished inside and outside by a reeling machine. The reeled tube is then sized by a sizing mill to the specified dimensions. From this step the tube goes through the straightener. This process completes the hot working of the tube. The tube (referred to as a mother tube) after finishing and inspection, becomes a finished product.

TypesUses
Structure PurposesGeneral structure and mechanical
Liquid ServicesPetroleum, gas and other fluids conveying
Low and Medium PressureSteam and boiler manufacturing
Hydraulic Pillar ServiceHydraulic support
Auto Semi-shaft CasingAuto seam-shaft casing
Line PipeOil and gas conveying
Tubing and CasingOil and gas conveying
Drill PipesWell drilling
Geological Drilling PipesGeological drilling
Petroleum Cracking TubesFurnace tubes, heat exchange


Pipe typesPipe Szie(mm)Tolerances
Hot rolledOD<50±0.50mm


≥50±1%

WT<4±12.5%


≥4～20+15%, -12.5%


>20±12.5%
Cold drawnOD6～10±0.20mm


10～30±0.40mm


30～50±0.45


>50±1%

WT<1±0.15mm


>1～3+ 15%, – 10%


>3+ 12.5%, – 10%


Standard

Grade

Chemical Components (%)

Mechanical Properties



c

Si

Mn

P

S

Mo

Cr

V

Tensile STrength(Mpa)

Yield STrength(Mpa)

Elongation

(%)

ASTM A53

A

≤0.25

/

≤0.95

≤0.05

≤0.06

≤0.15

≤0.40

≤0.08

≥330

≥205

≥29.5


B

≤0.30

/

≤1.2

≤0.05

≤0.06

≤0.15

≤0.40

≤0.08

≥415

≥240

≥29.5

 

Standard

Grade

Chemical Components(%)

Mechanical Properties



c

Si

Mn

P

S

Mo

Cr

V

Tensile STrength

(Mpa)

Yield STrength

(Mpa)

 Elongation(%)

ASTM A106

A

≤0.30

≥0.10

0.29-1.06

≤0.035

≤0.035

≤0.15

≤0.40

≤0.08

≥415

≥240

≥30


B

≤0.35

≥0.10

0.29-1.06

≤0.035

≤0.035

≤0.15

≤0.40

≤0.08

≥485

≥275

≥30

 

Standard

Grade

Chemical Components(%)

Mechanical Properties



c

Si

Mn

P

S

Tensile STrength(Mpa)

Yield STrength(Mpa)

Elongation(%)

ASTM A179

A179

0.06-0.18

/

0.27-0.63

≤0.035

≤0.035

≥325

≥180

≥35

 

Standard

Grade

Chemical Components(%)

Mechanical Properties



c

Si

Mn

P

S

Tensile STrength(Mpa)

Yield STrength(Mpa)

Elongation(%)

ASTM A192

A192

0.06-0.18

≤0.25

0.27-0.63

≤0.035

≤0.035

≥325

≥180

≥35

 

Standard

Grade

Chemical Components

Tensile STrength(min)

Yield Strength(min)

C

Mn

P

S

Mpa

Mpa

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

414

X65

0.28

1.40

0.030

0.030

531

448

X70

0.28

1.40

0.030

0.030

565

483

Standard

Grade

Chemical Components

Tensile STrength(min)

Yield Strength(min)

C

Mn

P

S

Mpa

Mpa

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



Bare, Lightly Oiled, Black/Red/Yellow Painting, Zinc/Anti-corrosive Coating



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