Swage Nipple Manufacturer, Supplier & Exporter
A swage nipple is a short, tapered fitting that joins a larger pipe to a smaller one, made by swaging (forging down) one end of a length of pipe or bar. Raaj Fittings manufactures and exports concentric and eccentric swage nipples to MSS SP-95, with plain, bevelled or threaded ends in any combination, in stainless steel, duplex, nickel alloys, carbon steel and alloy steel.
Swage nipples are the usual way to reduce size in small-bore piping, at vents, drains and instrument connections, and between a socket weld or threaded small-bore line and a larger buttweld line. One fitting does the job of a reducer and a nipple, with the ends prepared to suit both connections.
All swage nipples are supplied with EN 10204 3.1 mill test certificates, with 3.2 certification and third-party inspection on request.
We export swage nipples to EPC contractors, plant operators and stockists across the Middle East and GCC, Europe and the Americas — with NPT threads for US and Gulf projects or BSP threads where European and Middle Eastern specifications call for them.
Swage Nipple Specifications
Large ends from ¼" NPS to 8" NPS, reducing to any smaller standard size (larger to order)
Concentric and eccentric
SCH 40, SCH 80, SCH 160 and XXS; each end to its own schedule
Plain (PE), bevelled (BE) or threaded (TE) on each end, e.g. BLE × TSE
MSS SP-95; threads to ASME B1.20.1 (NPT) or BS 21 / ISO 7-1 (BSP); bevels to ASME B16.25
Swaged from seamless pipe or forged bar, then machined
EN 10204 3.1 mill test certificate as standard; EN 10204 3.2 on request
Materials & Grades
We supply swage nipples in the following materials and grades. All grades are supplied with EN 10204 3.1 / 3.2 Mill Test Certificates.
Stainless Steel Swage Nipples
Stainless steel forged fittings deliver excellent corrosion resistance in chemical, pharmaceutical, food processing, and marine environments. All grades supplied to ASTM A182 specification.
(ASTM A182 F304 / F304L) General corrosion resistance; food processing, dairy, and chemical service
(ASTM A182 F316 / F316L) Superior chloride and acid resistance; pharmaceutical, offshore, and chemical processing
(ASTM A182 F316H) Elevated-temperature creep strength for high-temperature process service
(ASTM A182 F317 / F317L) Higher molybdenum content; superior corrosion resistance in concentrated acid service
(ASTM A182 F321) Titanium-stabilised; resists sensitisation at sustained elevated temperatures
(ASTM A182 F347) Columbium-stabilised; used in heat exchangers and high-temperature piping
Duplex & Super Duplex Stainless Steel Swage Nipples
Delivering approximately twice the yield strength of austenitic stainless steel with excellent resistance to stress corrosion cracking, pitting, and erosion — ideal for offshore, subsea, and chemical processing environments.
(UNS S31803 / S32205, ASTM A182 F51) Offshore topsides, chemical plant, and seawater cooling systems
(UNS S32750, ASTM A182 F53) Subsea equipment, desalination, and high-chloride offshore service
(UNS S32760, ASTM A182 F55) High-temperature, high-chloride offshore and subsea service applications
Nickel Alloy Swage Nipples
For the most severe corrosive, high-temperature, and sour service environments where standard stainless steel grades are insufficient.
(UNS N06600) High-temperature oxidation and carburisation resistance
(UNS N06625) Outstanding corrosion resistance; offshore, chemical, and subsea service
(UNS N08825) Resistance to phosphoric and sulfuric acids; FGD and chemical plant
(UNS N10276) Universal corrosion resistance across the widest range of aggressive media
(UNS N06022) Superior resistance to oxidising and reducing acids and pitting attack
(UNS N04400) Seawater, hydrofluoric acid, and marine and alkali service
(UNS N08020) Engineered for sulfuric acid and aggressive chemical process service
Exceptional corrosion resistance in seawater and oxidising media at low density
Carbon Steel Swage Nipples
Carbon steel is the standard material for forged fittings in general-purpose, hydrocarbon, steam, and elevated-temperature service. The primary grade for forged carbon steel fittings is ASTM A105.
Primary grade for forged carbon steel fittings and flanges — covers ambient and elevated-temperature service in pressurised piping systems.
Low-temperature carbon steel, impact-tested for service down to -46°C (-50°F) — LNG, cold climate, and cryogenic piping applications.
Low-temperature carbon steel, impact-tested to -101°C (-150°F) — for the most demanding cold-temperature service applications.
Alloy Steel Swage Nipples
Chromium-molybdenum alloy steel grades for high-temperature, high-pressure service in power generation, petrochemical, and refinery applications. All grades supplied to ASTM A182 specification.
(5% Cr · ½% Mo) Refinery hydroprocessing and high-temperature service
(9% Cr · 1% Mo) High-temperature steam and hydrogen-rich process service
(1¼% Cr · ½% Mo) Thermal power plant steam, feedwater, and reheat piping
(2¼% Cr · 1% Mo) Reactors and high-temperature pressure piping in petrochemical plants
(9% Cr · 1% Mo · V · Nb) Ultra-supercritical power plant main steam and hot reheat piping
Concentric or Eccentric?
A concentric swage keeps both ends on the same centreline and is used in vertical lines and where alignment matters. An eccentric swage has one side straight, so the centrelines are offset; like an eccentric reducer, it is used in horizontal lines to avoid trapping air or liquid, and for drains that must empty completely.
End Designations
Swage nipples are described by the size and end preparation of each end — for example 2" × 1" BLE × TSE means bevel large end, thread small end. Common abbreviations are:
- PBE — plain both ends, for socket weld connections.
- BBE — bevelled both ends, for butt welding.
- TBE — threaded both ends.
- BLE × PSE / TSE — bevelled large end with a plain or threaded small end, to connect a buttweld line to a small-bore socket weld or threaded branch.
Swage Nipple or Bushing?
A bushing reduces a threaded opening in very little space, but adds a threaded joint and is limited in the reduction it can make. A swage nipple handles larger reductions, can be welded at one or both ends, and gives a smoother transition. For a same-size connection between fittings, a standard pipe nipple is used. At a branch, a forged reducing tee may avoid the swage altogether.
Applications & Industries
- Vent and drain connections from larger process lines
- Instrument connections and small-bore take-offs
- Transitions between buttweld and socket weld or threaded systems
- Wellhead, pipeline and offshore small-bore piping
- Hydraulic and utility systems
When ordering, give the large and small sizes, the type (concentric or eccentric), each end preparation and schedule, the overall length if non-standard, and the material grade.
See the complete range of forged fittings.
Testing, Inspection, Marking & Packing
Swage nipples are produced under our quality assurance process:
- Incoming material verification with PMI testing
- Chemical and mechanical testing to the applicable ASTM specification
- Heat treatment after swaging as required by the grade
- Dimensional inspection of length, both outside diameters, wall thickness, bevels and threads
- Marking with sizes, end types, schedules, grade and heat number
Supplied with EN 10204 3.1 mill test certificates; EN 10204 3.2 certificates and third-party inspection are available on request.
Fittings are packed for export with plastic caps protecting threads and sockets, rust-preventive or VCI wrapping on carbon and alloy steel, and seaworthy wooden cases; marking, tagging and packing to your specification are available on request.
Why Choose Raaj Fittings for Swage Nipples?
Raaj Sagar Steels has supplied piping components since 2003 and today manufactures forged fittings at two plants in India for buyers in the Middle East, Europe and the Americas.
- Manufactured in-house — Swage nipples are made in our own plants, so material, dimensions and delivery stay under our control.
- Ready stock, short lead times — common sizes and grades are held in stock for prompt dispatch; other sizes, grades and specials are manufactured to order.
- Certified quality — ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 certified; PED 2014/68/EU and IBR supply available, and NACE MR0175 / ISO 15156 material on request.
- 100% material verification — PMI testing on incoming material and EN 10204 3.1 mill test certificates with every order; 3.2 certificates on request.
- Third-party inspection ready — we regularly work with SGS, Bureau Veritas, TÜV and DNV.
- Export documentation — MTCs, certificates of origin, packing lists and inspection reports to suit projects in the GCC, Europe and the Americas.
- Export packing — seaworthy packing with end and face protection, and packing to your specification on request.
- Fast response — our team replies to enquiries within one business day.
Swage Nipples — FAQs
A swage nipple is a short tapered fitting that joins a larger pipe to a smaller one. It is made by swaging one end of a pipe or bar down to the smaller size.
A concentric swage keeps both ends on one centreline. An eccentric swage has one straight side, so the ends are offset; it is used in horizontal lines and drains.
It means bevelled large end and threaded small end. Other common ends are PBE (plain both ends), BBE (bevelled both ends) and TBE (threaded both ends).
MSS SP-95 covers swage nipples and bull plugs, including dimensions, tolerances and marking.
Yes. Each end is made to the schedule of the pipe it connects to — for example SCH 80 large end and SCH 160 small end.
Yes. We supply swage nipples for projects under the European Pressure Equipment Directive (PED 2014/68/EU), and with IBR certification for Indian boiler applications. NACE MR0175 / ISO 15156 compliant material is also available on request for sour service in the Middle East and the Americas.
