China Manufacturer LSAW and SSAW Welded Pipe
China Steel pipe with seamless and welded steel pipe
recently we have met some inquiry for welded pipe during mainly seamless pipe inquiry.
There are two ways for welded pipe . One is Spirally Submerged Arc Welding (SSAW pipe ) , another is longitudinal submerged arc welding(LSAW pipe)
For LSAW ,there are one seam welded pipe and double seams weled pipe. you can check pictures
Overview
Application
It Is Mainly Used for force and pressure parts, and for general purpose steam, water, gas and air pipes.
Main Grade
GR.A, GR.B
Chemical Component
|
Grade |
Component %，≤ | ||||||||
| C | Mn | P | S |
CuA |
NiA |
CrA |
MoA | VA | |
| S type（seamless pipe） | |||||||||
| GR.A | 0.25B | 0.95 | 0.05 | 0.045 |
0.40 |
0.40 |
0.40 |
0.15 | 0.08 |
| GR.B | 0.30C | 1.20 | 0.05 | 0.045 |
0.40 |
0.40 |
0.40 |
0.15 | 0.08 |
| E type（Resistance welded pipe） | |||||||||
| GR.A | 0.25B | 0.95 | 0.05 | 0.045 |
0.40 |
0.40 |
0.40 |
0.15 | 0.08 |
| GR.B | 0.30C | 1.20 | 0.05 | 0.045 |
0.40 |
0.40 |
0.40 |
0.15 | 0.08 |
| F type（Furnace Welded Pipe） | |||||||||
| A | 0.30B | 1.20 | 0.05 | 0.045 |
0.40 |
0.40 |
0.40 |
0.15 | 0.08 |
A The sum of these five elements must not be greater than 1.00%。
B For every 0.01% decrease in the maximum carbon content, the maximum manganese content is allowed to increase by 0.06%, but the maximum cannot exceed 1.35%.
C Each 0.01% decrease in the maximum carbon content will allow the maximum manganese content to increase by 0.06%, but the maximum must not exceed 1.65%.
Mechanical Property
| item | GR.A | GR.B |
|
tensile strength, ≥, psi [MPa] Yield Strength, ≥, psi [MPa] Gauge 2in.or 50mm elongation |
48 000 [330]30 000 [205]A,B | 60 000 [415]35 000 [240]A,B |
A The minimum elongation of gauge length 2in. (50mm) shall be determined by the following formula：
e=625000(1940)A0.2/U0.9
e = the minimum elongation of the gauge 2in. (50mm), the percentage rounded to the nearest 0.5%;
A = Calculated according to the specified outer diameter of the nominal tube or the nominal width of the tensile sample and its specified wall thickness, and rounded to the nearest cross-sectional area of the tensile sample of 0.01 in.2 (1 mm2), and It is compared with 0.75in.2 (500mm2), whichever is smaller.
U = specified minimum tensile strength, psi (MPa).
B For various combinations of different sizes of tensile test specimens and prescribed minimum tensile strength, the required minimum elongation is shown in Table X4.1 or Table X4.2, according to its applicability.
Test Requirement
Tensile test, bending test, hydrostatic test, nondestructive electrical test of welds.
Supply Ability
Supply Ability: 2000 Tons Per Month Per Grade Of ASTM A53/A53M-2012 Steel Pipe
Packaging
In Bundles And In Strong Wooden Box
Delivery
7-14 days if in stock, 30-45 days to produce
Payment
30% depsoit, 70% L/C or B/L copy or 100% L/C at sight
Product Detail
Boiler Tube
GB/T 8162-2008
ASTM A519-2006
BS EN10210-1-2006
ASTM A53/A53M-2012
GB9948-2006
GB6479-2013
