Seamless Steel Pipe
Seamless pipe, as the name suggests, is a pipe without a seam or a weld-joint. Seamless Steel Pipe is made from a solid round steel ‘billet’ which is heated and pushed or pulled over a form until the steel is shaped into a hollow pipe.
This specification covers wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. The pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation. All seamless and welded pipes shall be treated to control their micro-structure. Tensile tests, impact tests, hydro-static tests, and nondestructive electric tests shall be made in accordance to specified requirements.
1. Scope
1.1 This specification covers nominal (average) wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. Several grades of ferric steel are included as listed in Table 1. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse affect on low-temperature impact properties.
1.2 Supplementary Requirement S1 of an optional nature is provided. This shall apply only when specified by the purchaser.
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in non-conformance with the specification. The inch-pound units shall apply unless the "M" designation of this specification is specified in the order.
Parameter
Seamless Steel Pipe Chemical Composition and Mechanical Properties
This data is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
| Standard | Grade | Chemical Composition (%) | 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 A179 | A179 | 0.06-0.18 | - | 0.27-0.63 | ≤0.035 | ≤0.035 | ≥325 | ≥180 |
| ASTM A192 | 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 | |
Carbon Steel Seamless Pipe Chemical Composition and Mechanical Properties
| Standard | Grade | Chemical Composition | Mechanical Properties | |||||||||
| C | Si | Mn | P | S | Cr | Ni | Cu | Tensile Strength(Mpa) | Yield Strength(Mpa) | Elongation(%) | ||
| GB/T8163 | 10 | 0.07-0.14 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.15 | ≤0.25 | ≤0.25 | 335-457 | ≥205 | ≥24 |
| 20 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | ≤0.25 | 410-550 | ≥245 | ≥20 | |
| Q345 | 0.12-0.20 | 0.20-0.55 | 1.20-1.60 | ≤0.045 | ≤0.045 | - | - | - | 490-665 | ≥325 | ≥21 | |
Carbon Steel Seamless Pipe Tolerance
| Pipe types | Pipe Szie(mm) | Tolerances | |
| Hot rolled | OD | All | ±1% (min ±0.50mm) |
| WT | All | +15%, -12.5% | |
| Cold drawn | OD | 6～10 | ±0.20mm |
| 10～30 | ±0.40mm | ||
| 30～50 | ±0.45mm | ||
| >50 | ±1% | ||
| WT | ≤1 | ±0.15mm | |
| >1～3 | +15% -10% | ||
| >3 | +12.5% -10% | ||
Seamless Steel Pipe End
| Plain End | Wall Thickness less than 0.5 inch, including SCH STD & SCH XS |
| Plain End (Square Cut) | Wall Thickness over 0.5 inch, including SCH XXS |
| Beveled End | Wall Thickness less than 0.5 inch, including SCH STD & SCH XS |
| Couplings | Outside Diameter equal or less than 2'' |
| Thread Protection | Outside Diameter over 4 inch |
Packing & Delivery
The company's leading products mainly include various stainless steel products, screw steel, round steel, hot-rolled coils, medium and heavy plates, Channel steel, I-beam, angle steel strip, galvanized pipe, galvanized sheet and galvanized coil, carbon steel, PPGI/PPGL color-coated coil, galvanized corrugated steel plate, aluminum coil, aluminum tube, aluminum foil and various copper products .
Application Field
The main supply fields are: aerospace, national defense equipment, military weapons, chemical industry, shipbuilding, nuclear energy, trains, containers, environmental protection, precision Processing, auto parts, machinery, electronic products, molds, medical equipment, construction, decoration, etc.
Warehouse Storage
The company produces 1 million tons of pickling coils, 1 million tons of cold-rolled steel sheets, and 900,000 tons of hot-dip steel sheets annually through its primary production lines, which include pickling, cold rolling, hot-dip galvanizing, thick plate galvanizing, and color coating. The amount of thick galvanized steel sheets (450000 tons), color-coated steel sheets (300,000 tones), and hot-dip aluminum, zinc, and silicon steel sheets (500, 000 tons). It is one of Shandong Province's main suppliers of steel and non-ferrous metal smelting and processing.
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FAQ
Q:How about the samples? Is it free to extra fees?
A：Samples are free, you need to pay for shipping.
Q:How long is your delivery time?
A:Our daily inventory is more than 8000 tons, so far common products size,just need 5 days from stocks; if the special size from new production, delivery 7-15 days.
Q:How to control and guarantee your shipment quality?
A:1) All our factories are ISO 9001 certified facility; 2) World famous origin mills as TISCO, Bao steel; 3) Ex factory inspection by our own laboratory; 4) SGS/BV Third party inspection before delivery.
Q:Will you can accept the customized and OEM products?
A:Yes,we can do the production based on your drawings and with your logo,also because we have very strong design and development team,so the feedback is very good for customized product.
Q:What is your payment terms?
A:Commonly two payment term for new customers 1 ) 30%T/T as deposit,70% balance against B/L copy. 2)100% Irrevocable L/C at sight. If you need other terms, please feel free to contact us too, we will try our best.
