ASME B16.9 is a standard that covers the overall dimensions, tolerances, ratings, testing, and markings for factory-made wrought buttwelding fittings in sizes NPS 1/2 through NPS 48 (DN 15 through DN 1200). The function of butt-welding pipe fittings is to join or connect pipes together in a permanent and leak-proof manner. These fittings are designed for use in pipelines where a smooth and uninterrupted flow of fluids is essential. They provide a strong and reliable connection by welding the ends of two pipes directly together.
Buttwelding fittings come in various types, such as elbows, tees, reducers, caps, and crosses. Each type serves a specific purpose:
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Elbows: Elbows are used to change the direction of flow in a pipeline. They come in different angles, such as 45 degrees and 90 degrees, allowing for smooth directional changes.
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Tees: Tees have three openings and are used to create branches in a pipeline, dividing the flow into multiple directions.
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Reducers: Reducers are used to connect pipes of different sizes, allowing for a smooth transition in pipe diameter within a pipeline.
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Caps: Caps are used to seal the end of a pipe. They provide protection and prevent leakage.
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Crosses: Crosses have four openings and are used to create junctions in a pipeline, allowing flow in multiple directions.
These fittings are widely used in various industries, including oil and gas, chemical, petrochemical, power plants, and plumbing systems, to name a few. They are commonly made from materials such as stainless steel, carbon steel, or alloy steel, depending on the specific application requirements.
ASTM A403 WP316L Stainless Steel Pipe Fittings Specifications
| Specification | ASTM A403 / ASME SA403 |
| Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43 |
| Size | Seamless 1/2" - 10", Welded 1/2" - 48" |
| Type | Seamless / Welded / Fabricated |
| Thickness | Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS |
| Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom |
| Pipe Fittings Forms | Long Radius (LR) Elbow, Short Radius (SR) Elbow, 2D Elbow, 3D Elbow, 5D Elbow, 10D Elbow, Equal Cross, Unequal Crosses, Reducing Nipple, Butt Tee Fittings, Bend, Swedge Nipple, Pipe Nipple, Reducers, Caps, Stub End, Pipe / Piggable Bend, Elbow, 45 and 90° elbows, 180° bends, lap-joint stub ends |
| Standard | SS 316 | SS 316L |
| WERKSTOFF NR. | 1.4401 / 1.4436 | 1.4404 / 1.4435 |
| UNS | S31600 | S31603 |
| AFNOR | Z7CND17‐11‐02 | Z3CND17‐11‐02 / Z3CND18‐14‐03 |
| EN | X5CrNiMo17-12-2 / X3CrNiMo17-13-3 | X2CrNiMo17-12-2 / X2CrNiMo18-14-3 |
| JIS | SUS 316 | SUS 316L |
| BS | 316S31 / 316S33 | 316S11 / 316S13 |
| GOST | - | 03Ch17N14M3 / 03Ch17N14M2 |
Other Material Grades:
Nickel Alloy
ASTM / ASME SB 336 UNS 2200 (NICKEL 200), UNS 2201 (NICKEL 201 ), UNS 4400 (MONEL 400), UNS 8020 (ALLOY 20 / 20 CB 3, UNS 8825 INCONEL (825), UNS 6600 (INCONEL 600), UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 10276 (HASTELLOY C 276)
Stainless Steel
ASTM / ASME SA 403 GR WP "S" / "W" / " WX" 304 , 304L, 304H, 304N, 304LN, 309, 310H, 316, 316H, 317, 317L, 321, 321H, 347, 347 H.
Duplex Steel
ASTM / ASME SA 815 UNS NO.S 31803, S 32205, S 32550, S 32750, S 32760.
Carbon Steel
ASTM / ASME A 234 WPB, WPC
ASTM / ASME A 860 WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70.
Alloy Steel
ASTM / ASME A 234 WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 23, WP 91
| Standard | ASTM A403 /ASME SA403 | WP-W | ANSI B16.9/MSS SP-43 |
| KS : KOREAN INDUSTRIAL STANDARDS | KS B 1522: Steel Butt Welding Pipe Fittings for Oidinary use and Fuel Gas KS B 1541: Steel Butt Welding Pipe Fittings KS B 1542: Steel Socket Welding Pipe Fittings KS B 1543: Steel Plate Butt Welding Pipe Fittings |
| JIS : JAPANESE INDUSTRIAL STANDARDS | JIS B 2311: Steel Butt Welding Pipe Fittings for Ordinary use JIS B 2312: Steel Butt Welding Pipe Fittings. JIS B 2313: Steel Plate Butt Welding Pipe Fittings JIS B 2316: Steel Socket Welding Pipe Fittings |
Applications
- Oil and gas industry
- Medical Gas Pipeline Systems
- Pharmaceutical processing industry
- Fluid piping
- Modern architecture
- Water waste projects
- Pipeline projects
- Onshore and offshore
- Power Generation
