Specifications: diameter: 320 to 127 mm thickness: 0.4 to 12.7 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe

The difference between the ERW pipe and Seamless pipe


The difference between the steel and plastic

 

 

name ERW steel pipes
ERW PIPE
size 16"-56" (406mm-1422mm)
Type LSAW,WELDED STEEL PIPE .longidutinal welded
thickness 8-50mm
standard SO3183 ,API SPEC 5LPSL2,API SPEC 2B,ASME etc.
material ASTM A106B,ASTM A53 B,ASTM A178-C,ASTM A519 1020,API 5L GRB,ASTM A333 GR6,API 5L GRB ,X42 X46 X52 X56 X60 X65 X70
 

 

1.Production details:

 STANDARD

GRADE

CHEMICAL COMPOSITION

C

Si

Mn

P

S

Cr

Mo

Cu

Ni

V

ASME SA106

SA106B

0.170.25

≥0.1

0.701.00

≤0.030

≤0.030

≤0.035

 

 

 

 

  ASTM A106

    A

≤0.25

≤0.10

0.270.93

≤0.035

≤0.035

≤0.40

≤0.15

≤0.40

≤0.40

≤0.08

    B

≤0.30

≤0.10

0.291.06

≤0.035

≤0.035

≤0.40

≤0.15

≤0.40

≤0.40

≤0.08

    C

≤0.35

≤0.10

0.291.06

≤0.035

≤0.035

≤0.40

≤0.15

≤0.40

≤0.40

≤0.08

ASTM A53

    A

0.25

/

0.95

0.05

0.045

0.40

0.15

0.40

0.40

0.08

    B

0.3

/

1.2

0.05

0.045

0.40

0.15

0.40

0.40

0.08

 ASTM A179

  A179

≤0.06-0.18

/

0.27-0.63

≤0.035

≤0.035

 

 

 

 

 

  ASTM A192

  A192

0.060.18

≤0.25

0.270.63

≤0.035

≤0.035

 

 

 

 

 

 ASTM A210

  A-1

≤0.27

≥0.10

≤0.93

≤0.035

≤0.035

 

 

 

 

 

   C

≤0.35

≥0.10

0.291.06

≤0.035

≤0.035

 

 
 
 

 
SEAMLESS STEEL PIPE
API 5L GR.B ASTM A106 18inch sch120 Seamless Pipe
1.Standard: API 5L Latest Edition 

2.Steel Grade:X42,X52,X60,X65,X70 

We are professional manufacturer of carbon steel seamless pipe, which have been approved by API and ISO systerm.

1. OD: 1/2" to 24" W. T: 3mm-40mm ( SCH 20 to SCH 180)
2. Standard: A STM A 106/ APL 5L

 

Carbon Steel Seamless Pipe

Carbon Steel Seamless Pipe

 

 

High-frequency straight seam resistance welding pipes (Electric Resistance Welding, referred to as ERW) and seamless steel pipe ERW biggest difference is that there are of welds, and this is the key to ERW pipe quality. Modern ERW pipe production technology and equipment, as the international community, especially the United States and other years of unremitting efforts, making the seamless steel pipe ERW have been more satisfactory solution.
Carbon Steel Seamless Pipe
Someone ERW seamless steel pipe seamless geometry and physics into seamless. Geometric seamless ERW steel pipe is to remove the internal and external burrs. Since the structure of the inner burr removal system and tool of continuous improvement and perfection, medium and large diameter steel pipe inside burr removal has been a good deal. Can be controlled within the burr-0.2mm ~ O.5mm so. Refers to the physical seamless weld microstructure inside there is a difference between the base material and weld area resulting in decreased mechanical properties, the need to take measures to make it uniform and consistent technology. ERW steel pipe for high-frequency welding thermal process, resulting in a temperature gradient is near the edge of tube and forming a molten zone, the semi-molten zone, overheating tissue, normalized area, areas not fully normalizing, tempering zones of the feature region. Which overheated zone tissue due to soldering temperature above 1000 ℃, the austenite grain grown dramatically in the cooling conditions will form a hard and brittle coarse crystalline phase, in addition to the presence of a temperature gradient will produce welding stress. Thus, the formation of the weld zone lower than the base metal mechanical properties of the situation is through physical seamless weld heat treatment process which uses local conventional induction heating device will weld area is heated to AC3 (927 ℃), then 60m length, the speed 20m / min during air cooling, water cooling when necessary. This method is used to achieve the elimination of stress, soften and refine the organization to improve the HAZ mechanical properties purposes. Currently, the world's advanced ERW unit This method has been widely used for processing of the weld has obtained good results. Quality can not be argued that not only ERW pipe welds and weld coefficient of 1, the realization of regional organizations of the weld and base metal of the match.
 
ERW steel pipe with both hot-rolled coil as a result of use of raw materials, wall thickness can be controlled within ± 0.2mm or so, according to the U.S. steel two-side APl standards or GB/T9711.1 standard repair side beat groove, cut length delivery and so on. In recent years, the natural gas pipeline network and gas companies have been widely adopted as Chengshiguanwang ERW pipe main pipe.
 

上一篇:Steel Pipe Rehabilitation Coating Steel Pipeline,Anti-corros

下一篇:March 2013 National welded sub-varieties of export statistic

 Copyright ©2012 New SindaIf you do not find the information you need, Click Here  Get Support

New Update Pipe List


    JIS G3461,JIS G3462 Seamless Steel Pipe for Boiler & Heat exchanger .


    API 5l A53 ERW Pipe,ERW steel pipe JCEO Wall thickness:0.5mm-25 ISO,TUV,AD,PED cert. GB/T3091-2001 Material include Q235 20# 16Mn(Q345,Q215) .


    ASTM A53 B SCH40 ERW pipe.
Contact Us Online To Serve You Better

Hot Click PRO