Size:
Outer Diameter: 1/8"-26"(10.3mm-660.4mm)
Wall Thickness: 1.0mm-20mm
Length: Random Length,SRL,DRL(4-14M)
Steel Grade:
A53 Gr. A, Gr B, A106 GR.A GR.B A333 GR1 GR3 GR6 A335 P1 P2 P5 P11 P12 P22 P9 A213 T2 T5 T11 T12 T22 T9 A210-C
End:pland ends beveled ends
Surface: Bare, Black,Lightly oiled, Hot dip galvanized,, Varnish coating/Anti rust oil, Protective Coatings, 3PE
Packing:Nude, Plastic/steel plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips, Plastic caps.
The process begins with solid steel rounds, or billets, being cut to a specified length and sent through a walking-beam reheat furnace, where temperatures reach nearly 2,300°F.
After exiting the reheat furnace, the preheated rounds are turned into a tube shell in the rotary piercing mill as the billets are cross-rolled between two barrel-shaped rolls at a high speed.
The seamless shells enter mandrel mill, where they are rolled over a retained mandrel to provide the needed OD size and wall thickness for the next process. The process is carefully monitored using a state-of-the-art hot-wall measuring system.
The shells are then reheated for final forming in a 24-stand stretch-reducing mill, where outside diameters are formed to customers' exacting specifications. Wall thickness is again verified using a hot-wall measuring system.
After being rotated and advanced on the walking-beam cooling bed, the pipes are batch cut and transferred to an in-process storage area, where they are handled by computer-controlled gantry cranes.
| ASTM A53 /A106 Chemical Components and Machanical Property |
| Standard |
Steel Grade |
Chemical Components |
Machanical Property |
| C |
Mn |
P |
S |
Cu |
Ni |
Cr |
Mo |
V |
Tensile Strength (Mpa) |
Yield Strength(Mpa) |
Elongation (Mpa) |
| ASTM A53 |
A |
≤0.25 |
≤0.95 |
≤0.05 |
≤0.045 |
≤0.40 |
≤0.40 |
≤0.40 |
≤0.15 |
≤0.08 |
≥330 |
≥205 |
≥29.5 |
| B |
≤0.30 |
≤1.20 |
≤0.05 |
≤0.045 |
≤0.40 |
≤0.40 |
≤0.40 |
≤0.15 |
≤0.08 |
≥415 |
≥240 |
≥29.5 |
| Standard |
Steel Grade |
Chemical Components |
Machanical Property |
| C |
Si |
Mn |
P |
S |
Cu ,Ni |
Cr |
Mo |
V |
Tensile Strength (Mpa) |
Yield Strength(Mpa) |
Elongation (Mpa) |
| ASTM A106 |
B |
≤0.30 |
≥0.10 |
0.29-1.06 |
≤0.035 |
≤0.035 |
≤0.40 |
≤0.40 |
≤0.15 |
≤0.08 |
≥415 |
≥240 |
≥30 |
| C |
≤0.35 |
≥0.10 |
0.29-1.06 |
≤0.035 |
≤0.035 |
≤0.40 |
≤0.40 |
≤0.15 |
≤0.08 |
≥485 |
≥275 |
≥30 |
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