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ASTM A403 Stainless Steel High Pressure Forged THD Threaded Coupling
Product Information
The ASTM A403 Stainless Steel Threaded Coupling is manufactured from high-quality stainless steel material, which offers excellent corrosion resistance and durability. It is designed to connect two threaded pipes or fittings securely and efficiently. The coupling features internal threads on both ends, allowing for a tight and reliable connection with external threaded pipes or fittings.
| Product Name | ASTM A403 WP304 ASME B16.11 Forged THD High Pressure Stainless Steel Threaded Coupling |
| Thread Type | ASME B1.20.1(NPT), BS 21 (NSPT), DIN2999/259 |
| Size Range | Dimension: 1/8” to 4” |
| Wall Thickness | SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120,SCH140, SCH160, XXS |
| Standards | ASTM A403 |
| Pressure Class | 3000 LBS, 6000 LBS, 9000 LBS |
| Dimensions | ASME B16.11 |
ASTM A403 Chemical Compositions (%)
| Grade A | Composition (%) | |||||||||
| Grade WP | UNS Designation | C | Mn | P | S | Si | Ni | Cr | Mo | Ti |
| WP304 | S30400 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 8.0-11.0 | 18.0-22.0 | ﹍ | ﹍ |
| WP304L | S30403 | 0.030E | 2.00 | 0.045 | 0.030 | 1.00 | 8.0-12.0 | 18.0-22.0 | ﹍ | ﹍ |
| WP310S | S31008 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 19.0-22.0 | 24.0-26.0 | ﹍ | ﹍ |
| WP316 | S31600 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 10.0-14.0 | 16.0-18.0 | 2.00-3.00 | |
| WP316L | S31603 | 0.030E | 2.00 | 0.045 | 0.030 | 1.00 | 10.0-14.0 | 16.0-18.0 | 2.00-3.00 | ﹍ |
| Wp321 | S32100 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 9.0-12.0 | 17.0-19.0 | ﹍ | |
Standards & Materials: ASTM A403
ASTM A403 Stainless Steel Pipe Fittings refers to the material of forged and rolled austenitic stainless fittings for pressure pipes. Common grades are WP304/L, WP316/L. They can be used into many fields as engineering industry, energy conversion plants etc.
The ASTM A403 Stainless Steel Threaded Coupling offers several advantages. It allows for easy installation and disassembly without requiring specialized tools or welding. The threaded connection provides a reliable and leak-free joint, suitable for both low and high-pressure applications. Additionally, the stainless steel construction ensures resistance to corrosion and other harsh environmental factors, making it suitable for demanding operating conditions.
Note:
Where a ellipsis(﹍)appears in the table, there is no requirement and the element need to be analyzed for or reported
The method of analysis for nitrogen shall be a matter of agreement between the purchaser and manufacturer
Columbium 0.10-0.30%; Vanadium 0.10-0.30%.
For small diameter or thin walls, or both, where many drawing passes are required, a carbon maximum of 0.04% is necessary in grades TP304L and TP316L. Small outside diameter tubes are defined as those less than 0.500in.(23.7mm) in outside diameter and light wall tubes as those less than 0.049in.(1.24mm) in average wall thickness
Dimensions of ASME B16.11 Threaded (THD) Coupling
The drawing of ASME B16.11 forged coupling with two threaded (THD) ends. B: minimum length of perfect thread; L2: effective length of external thread; D: outside diameter; W: end to end length of threaded coupling.
| NPS | B | L2 | D 3000# | D 6000# | W |
| 1/8" | 6.4 | 6.7 | 16 | 22 | 32 |
| 1/4" | 8.1 | 10.2 | 19 | 25 | 35 |
| 3/8" | 9.1 | 10.4 | 22 | 32 | 48 |
| 1/2" | 10.9 | 13.6 | 28 | 38 | 48 |
| 3/4" | 12.7 | 13.9 | 35 | 44 | 51 |
| 1" | 14.7 | 17.3 | 44 | 57 | 60 |
| 1-1/4" | 17.0 | 18.0 | 57 | 64 | 67 |
| 1-1/2" | 17.8 | 18.4 | 64 | 76 | 79 |
| 2" | 19.0 | 19.2 | 76 | 92 | 86 |
| 2-1/2" | 23.6 | 28.9 | 92 | 108 | 92 |
| 3" | 25.9 | 30.5 | 108 | 127 | 108 |
| 4" | 27.7 | 33.0 | 140 | 159 | 121 |
