Pipe Fittings · MSS SP-95 · ASME B36.10 / B36.19
Nipple — MSS SP-95
Nipple — a short length of pipe, threaded or plain, used to connect fittings. Pipe nipples connect valves and fittings in small-bore lines. Swage nipples (MSS SP-95) also change size between their two ends.
- MSS SP-95
- 22 grades
- EN 10204 3.1 / 3.2
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
Nipple: What to Know Before Ordering
- Close, short and long lengths
- Swage nipples to MSS SP-95
- Threaded both ends, one end, or plain
Nipple Materials & Grades
| Grade | Material standard | Best for |
|---|---|---|
| Inconel 825 nipple | ASTM B564 | Sulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas |
| SS 904L nipple | ASTM A182 F904L | Dilute sulphuric acid, phosphoric acid and chloride-bearing cooling water |
| SS 304 nipple | ASTM A182 F304 | General corrosion resistance, food, water and architectural work |
| SS 304L nipple | ASTM A182 F304L | Welded tanks, piping and vessels in general corrosive service |
| SS 310 / 310S nipple | ASTM A182 F310 | Furnaces, burners and heat treatment at high temperature |
| SS 316 / 316L nipple | ASTM A182 F316L | Chloride-bearing process fluids, marine air and pharmaceutical service |
| SS 321 nipple | ASTM A182 F321 | High-temperature service between 425 and 815 °C |
| SS 347 nipple | ASTM A182 F347 | Welded high-temperature piping in refineries and power plants |
| Duplex 2205 nipple | ASTM A182 F51 / F60 | Strength with chloride resistance at a stainless-steel budget |
| Super Duplex 2507 nipple | ASTM A182 F53 | Seawater and high-chloride service where strength also matters |
| Inconel 600 nipple | ASTM B564 | High-temperature oxidation, caustic and nuclear service |
| Inconel 625 nipple | ASTM B564 | Seawater, high strength and high temperature in one alloy |
| Inconel 718 nipple | ASTM B637 | Very high strength at temperatures up to about 650 °C |
| Incoloy 800 / 800H / 800HT nipple | ASTM B564 | Furnaces, petrochemical heaters and high-temperature piping |
| Hastelloy C276 nipple | ASTM B564 | The most aggressive mixed acids, wet chlorine and hypochlorite |
| Hastelloy C22 nipple | ASTM B564 | Mixed oxidising and reducing acids, and weld overlays |
| Monel 400 nipple | ASTM B564 | Seawater, hydrofluoric acid and marine service |
| Super Duplex S32760 nipple | ASTM A182 F55 | Seawater firewater, injection and offshore piping |
| ASTM A106 Gr B nipple | ASTM A105 | High-temperature process and steam piping in refineries and power plants |
| ASTM A333 Gr 6 nipple | ASTM A350 LF2 | Cold-climate and refrigerated piping down to −45 °C |
| ASTM A335 P11 nipple | ASTM A182 F11 | Steam and hot-oil piping up to about 550 °C |
| ASTM A335 P22 nipple | ASTM A182 F22 | High-pressure steam and hydrogen service up to about 580 °C |
Other pipe fittings
ElbowA fitting that changes the direction of a pipe run.TeeA fitting with a 90° branch that splits or combines flow.ReducerA fitting that joins two pipes of different sizes.CapA fitting that closes the end of a pipe.Stub endA short pipe length with a flared lap that works with a lap joint flange.CrossA four-way fitting with branches at 90°.BendA pipe bend with a larger radius than a standard elbow.LateralA fitting with a 45° branch.CouplingA short forged fitting that joins two pipes.UnionA three-piece forged fitting that joins pipes and can be taken apart.PlugA threaded fitting that closes a female connection.
Nipple — questions buyers ask
What is a swage nipple?
A nipple that reduces from one size to another, concentric or eccentric, to MSS SP-95.
Which grades are nipples available in?
Inconel 825, SS 904L, SS 304, SS 304L, SS 310 / 310S, SS 316 / 316L, SS 321, SS 347, Duplex 2205, Super Duplex 2507, Inconel 600, Inconel 625, Inconel 718, Incoloy 800 / 800H / 800HT, Hastelloy C276, Hastelloy C22, Monel 400, Super Duplex S32760, ASTM A106 Gr B, ASTM A333 Gr 6, ASTM A335 P11, ASTM A335 P22.
Which standard covers nipple dimensions?
MSS SP-95 · ASME B36.10 / B36.19. The material standard depends on the grade.
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