Hot Finished Seamless Steel Pipe For High Temperature Service
Description
Hot Finished Seamless Pipe is manufactured by heating a solid steel billet to a high temperature and piercing it over a mandrel to form a hollow tube without any welded seam. This process results in a pipe with uniform wall thickness, a refined grain structure, and consistent mechanical properties, making it the preferred choice for high‑pressure, high‑temperature, and critical service applications.
Standards of Seamless Pipe
| STANDARDS |
GRADES |
CLASS |
| API |
API 5L |
Line pipe for pipeline transportation systems |
| API 5CT |
Tubing and casing for wells |
| API 5DP |
Drill Pipe for well drilling |
| ASTM |
ASTM A53 |
Used as structural steel or for low-pressure plumbing |
| ASTM A106 |
Seamless carbon steel pipe for high-temperature service |
| ASTM A335 |
For seamless ferritic alloy-steel pipe for high-temperature service |
| ASTM A213 |
For seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes |
| ASTM A179 |
For seamless Cold-drawn low-carbon steel heat-exchanger and condenser tubes |
| ASTM A192 |
For seamless carbon steel boiler tubes for high-pressure service |
| ASTM A210 |
For seamless medium-carbon steel boiler and superheater tubes |
| ASTM A333 |
For seamless steel pipe for low-temperature service and other applications with required notch toughness |
| ASTM A519 |
For seamless carbon and alloy steel mechanical tubing |
| ASTM A252 |
For seamless and welded steel pipe piles |
| DIN |
DIN 17175 |
For heat resistant seamless steel pipe lines |
| DIN 1629 |
For seamless circular tubes of non alloys steels wth special quality requirements |
| DIN 2391 |
For cold drawn or cold rolled precision seamless steel tubes |
| JIS |
JIS G3454 |
Seamless carbon steel pipe for pressure service |
| JIS G3456 |
Seamless carbon steel pipe for high temperature service |
| JIS G3461 |
Seamless carbon steel pipe for boiler and heat exchanger |
| EN |
EN 10210 |
For hot finished seamless structural hollow sections of non-alloy steels |
| EN 10216 |
Seamless steel tubes for pressure purposes |
| BS |
BS 3059 |
For carbon,alloy and austenitic stainless steel tubes with specified elevated temperature properties |
Chemical Composition of Seamless Pipe
| Standard |
Grade |
Chemical Components (%) |
Mechanical Properties |
| C |
Si |
Mn |
P |
S |
Tensile STrength(Mpa) |
Yield STrength(Mpa) |
| ASTM A53 |
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 |
- |
0.9 |
0.03 |
0.03 |
≥331 |
≥207 |
| B |
0.28 |
- |
1.2 |
0.03 |
0.03 |
≥414 |
≥241 |
| X42 |
0.28 |
- |
1.3 |
0.03 |
0.03 |
≥414 |
≥290 |
| X46 |
0.28 |
- |
1.4 |
0.03 |
0.03 |
≥434 |
≥317 |
| X52 |
0.28 |
- |
1.4 |
0.03 |
0.03 |
≥455 |
≥359 |
| X56 |
0.28 |
- |
1.4 |
0.03 |
0.03 |
≥490 |
≥386 |
| X60 |
0.28 |
- |
1.4 |
0.03 |
0.03 |
≥517 |
≥448 |
| X65 |
0.28 |
- |
1.4 |
0.03 |
0.03 |
≥531 |
≥448 |
| X70 |
0.28 |
- |
1.4 |
0.03 |
0.03 |
≥565 |
≥483 |
| API 5L PSL2 |
B |
0.24 |
- |
1.2 |
0.025 |
0.015 |
≥414 |
≥241 |
| X42 |
0.24 |
- |
1.3 |
0.025 |
0.015 |
≥414 |
≥290 |
| X46 |
0.24 |
- |
1.4 |
0.025 |
0.015 |
≥434 |
≥317 |
| X52 |
0.24 |
- |
1.4 |
0.025 |
0.015 |
≥455 |
≥359 |
| X56 |
0.24 |
- |
1.4 |
0.025 |
0.015 |
≥490 |
≥386 |
| X60 |
0.24 |
- |
1.4 |
0.025 |
0.015 |
≥517 |
≥414 |
| X65 |
0.24 |
- |
1.4 |
0.025 |
0.015 |
≥531 |
≥448 |
| X70 |
0.24 |
- |
1.4 |
0.025 |
0.015 |
≥565 |
≥483 |
| X80 |
0.24 |
- |
1.4 |
0.025 |
0.015 |
≥621 |
≥552 |
Tolerances of carbon seamless steel pipe
| Pipe types |
Pipe sizes(mm) |
Tolerances |
| Hot rolled |
OD<50 |
±0.50mm |
| OD≥50 |
±1% |
| WT<4 |
±12.5% |
| WT 4～20 |
+15%, -12.5% |
| WT>20 |
±12.5% |
| Cold drawn |
OD 6～10 |
±0.20mm |
| OD 10～30 |
±0.40mm |
| OD 30～50 |
±0.45 |
| OD>50 |
±1% |
| WT≤1 |
±0.15mm |
| WT 1～3 |
+15%, -10% |
| WT >3 |
+12.5%, -10% |
Types of Seamless Steel Pipe and Application
| Types |
Application |
| Structure Purposes |
General structure and mechanical |
| Liquid Services |
Petroleum, gas and other fluids conveying |
| Low and Medium Pressure Boiler Tube |
Steam and boiler manufacturing |
| Hydraulic Pillar Service |
Hydraulic support |
| Auto Semi-shaft Casing |
Auto sem-shaft casing |
| Line Pipe |
Oil and gas conveying |
| Tubing and Casing |
Oil and gas conveying |
| Drill Pipes |
Well drilling |
| Geological Drilling Pipe |
Geological drilling |
| Furnace tubes, heat exchangers tubes |
Furnace tubes, heat exchangers |
Seamless Steel Pipe Manufacturing Process
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.
Packing & Loading
a. 1/2"-2"Plain end with black oil paint, caps both ends, bundles with loading belt.
b. 2"-4"Beveled end with black oil paint, caps both ends, bundles with loading belt.
c. 10"-20"Beveled end with black oil paint, caps both ends, loose packed in to container.
Beveled End Pipe Marking Black Painting
Pipe end caps Protective Final inspection Bundles Packing
Shipping
a.By container
b.By bulk
Product Tags:
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Hot Finished Seamless Steel Pipe API 5L ASTM A106 Grade B For High Temperature Service Images
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