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Seamless steel pipe

Seamless steel pipe has a better pressure-bearing capacity and is stronger than ERW welded steel pipe. Therefore it is widely used in high pressure equipment, heat and boiler industry. The weld seam of general welded steel pipe is the weak point and the quality affects the overall performance.

Seamless steel pipe introduction

Seamless steel pipe is a steel pipe made of whole round steel perforated with no welded seam on the surface called seamless steel pipe. Seamless steel pipe can be divided into hot-rolled seamless steel pipe, cold-rolled seamless steel pipe, cold-drawn seamless steel pipe, extruded seamless steel pipe, top pipe, etc. according to the production method. According to the cross-sectional shape, seamless steel pipe is divided into two types: round and shaped. Shaped tubes are square, oval, triangular, hexagonal, melon, star, finned tubes, etc. The maximum diameter is 900mm, and the minimum diameter is 4mm. depending on the use, there are thick-walled seamless steel pipe and thin-walled seamless steel pipe. Seamless steel pipes are mainly used as petroleum geological drilling pipes,
Steel billets and coils are sent to pipe mills to be prepared for making carbon steel pipes. Depending on the capacity of the pipe mill and the end use of the final product, the castings are made into pipe through four different manufacturing processes. Seamless carbon steel pipe, as the name implies, has no longitudinal welds. Essentially, it is a solid piece of homogeneous steel. A solid billet is simply heated and then stretched over a series of mandrels until the pipe reaches the desired diameter and wall thickness.

Chemical components & mechanical properties

Standard

Grade

Chemical Components (%)

Mechanical Properties

ASTM A53

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

B

≤0.35

≥0.10

0.29-1.06

≤0.035

≤0.035

≥485

≥275

ASTM SA179

A179

0.06-0.18

-

0.27-0.63

≤0.035

≤0.035

≥325

≥180

ASTM SA192

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

Seamless steel pipe specification

Standard

API, ASTM, BS, DIN, GB, JIS

Outside Diameter

21.3-1420mm

Wall Thickness

2.11-300mm

Dia Tolerance

Control with in the standard, OD:+-1%, WT:+-10%

Materials

10#,20#,45#,Q235,Q345,Q195,Q215,Q345C,Q345A

ASTM A53A/A53B/ A178C/A106B API5L

ST37,ST37-2,DIN 1629 ST35, ST45,DIN 17175 ST35.8,DIN 17175 19Mn5

16Mn,Q345B,T1,T2,T5,T9,T11,T12,T22,T91,T92,P1,P2,P5,P9,P11,P12,P22,P91,P92,15CrMO,Cr5Mo,10CrMo910,12CrMo,13CrMo44,30CrMo,A333
GR.1,GR.3,GR.6,GR.7

Gr.B,X42,X46,X52,X60,X65,X70,X80,X100

Inspection

ISO,BV,SGS,MTC 

Packing

Steel strip packed. Standard Export Seaworthy Package.Suit forall kinds of transport,or as required

MOQ

1 ton,sample order accepted

Shipment time

Within 7-10 workdays after receiving deposit or L/C

Application

Widely used in Structure, Accessorize,Construction,
Fluid transportation,machinery parts,the stress parts of the automobile
tractor parts and so on

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lndustries Served

Every industry has its unique set of material specifications and needs. That’s why you can count on the exceptional experience and industry knowledge of the professionals at Kuaima Steel - Meeting the Exact Needs of Every Industry That Uses steel.

  • Machinery manufac- turing industry
  • Power Generation
  • Oil & Gas
  • Manufacturing
  • Construction
  • Ship Building
  • Automobile manufacturing
  • Pipe Fabrication

Our main export country

We are a well known worldwide exporter of Seamless steel pipe, Ireland, Portugal, Gambia, Thailand, Ukraine, United Kingdom, Netherlands, South Africa, Spain, Turkey, Italy, Libya, Romania, Puerto Rico, Azerbaijan, United Arab Emirates, Pakistan, Philippines, Ghana, Slovakia, Germany, Saudi Arabia, Afghanistan, China, Bolivia, Switzerland, Bangladesh, Taiwan, Oman, Egypt, Greece, Norway, Singapore, Bulgaria, Estonia, Belgium, Yemen, Hong Kong, Ecuador, Sri Lanka, Nepal, Belarus, Finland, Gabon, Iran, Canada, Argentina, Lebanon.

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