Reinforced Swage Nipple

Our reinforced swage nipple is integrated hot forged reducing fitting with thickened reinforced body, used for diameter transition of small-bore high-pressure pipelines. Manufactured strictly per ASME B16.11 & MSS SP-79 standards, all sizes keep full nominal dimension without minus tolerance, widely applied for power, hydraulic, fire and low-temperature industrial piping systems.

Overview

Reinforced Swage Nipple, also called forged reducing swage connector, is one-piece hot forged stepped reducing fitting. Its middle section adopts thickened reinforced structure, which greatly improves pressure resistance and mechanical strength compared with ordinary swage nipple. Two ends are designed for socket weld or butt weld connection to connect two pipes of different diameters for straight pipeline transition.

Integrally hot forged from A350 LF2 low-temperature carbon steel (A105 carbon steel, A182 F304/F316L stainless steel optional). Uniform thick wall and reinforced middle body avoid deformation under high pressure. We strictly control OD, ID and wall thickness of every swage nipple, guarantee zero minus tolerance without thin-wall cutting corners. Three standard pressure classes: Class3000, Class6000, Class9000 to satisfy low-temperature and high-pressure working conditions.

Core Key Features

One-piece hot forging integrated forming, thickened reinforced middle body, ultra-high pressure & impact resistance
Step reducing design, realize straight transition of different-diameter small-bore pipelines
Dual end connection options: socket weld / butt weld, flexible welding construction
Main raw material: A350 LF2 low temperature carbon steel; A105 CS / SS F304/F316L optional
Fully comply with international standards ASME B16.11 & MSS SP-79
Complete size coverage: DN6 ~ DN100 (1/8″ ~ 4″), all custom reducing ratios supported
Zero minus tolerance on all dimensional parameters, full standard nominal size
Full MPI magnetic particle testing & hydrostatic pressure test before shipment, complete MTC material test certificates provided

Technical Specification

Item	Technical Parameter
Product Name	Reinforced Swage Nipple / Forged Reducing Swage Connector
Connection Type	Double End Socket Weld / Butt Weld Optional
Production Craft	Hot Forged One-Piece Integral Forming (Reinforced Thickened Body)
Executive Standard	ASME B16.11, MSS SP-79
Available Materials	A350 LF2 Low Temp Carbon Steel; A105 CS; SS A182 F304 / F316L
Pressure Class	Class 3000, Class 6000, Class 9000
Size Range	DN6 ~ DN100 / 1/8″ ~ 4″
Wall Schedule	Sch80, Sch160, XXS, Custom wall thickness
Structure Feature	Thickened reinforced middle section for high pressure load
Dimensional Tolerance	Full standard nominal size, zero minus tolerance
Inspection Items	MPI Magnetic Particle Test, Hydrostatic Test, Full Dimension Inspection
Surface Treatment	Black anti-rust paint (Carbon Steel); Pickling & Passivation (Stainless Steel)

Applications

ur forged reinforced swage nipples are widely used in small-bore high-pressure & low-temperature industrial piping systems:

Thermal power plant instrument auxiliary low-temperature pipelines
Offshore marine low temperature high-pressure hydraulic piping
Hydraulic equipment heavy load pressure transition pipelines
Fire protection small-bore high-pressure branch piping
LNG & cryogenic equipment low-temperature process pipelines
Oil & gas field measuring instrument pressure pipeline transition
Chemical plant high-pressure small-bore control piping

Why Choose Our Reinforced Swage Nipple

Direct forged fitting factory supply, stable stock & competitive ex-work factory price
All swage nipples produced to full standard dimensions with zero minus tolerance, never cut corners with thin walls
Regular common sizes in stock, fast delivery within 7–15 working days
Custom special reducing ratio, wall thickness and surface treatment supported based on customer drawings
Complete export certification package: Material Test Certificate (MTC), MPI NDT report, dimensional inspection sheet
Standard export wooden case packaging, avoid scratch, rust and deformation during long-distance sea transport

FAQ

Q1: What is the advantage of reinforced swage nipple over ordinary swage nipple?

A: Reinforced swage nipple has thickened middle reinforced section, higher wall thickness and stronger bearing capacity, suitable for high pressure, low temperature and heavy vibration working environments where ordinary thin-body swage nipples cannot meet requirements.

Q2: Do your reinforced swage nipples have minus tolerance on wall thickness?

A: All our forged pipe fittings are strictly manufactured to full nominal standard dimensions. We guarantee zero minus tolerance on outer diameter and wall thickness, we never use thinner raw materials to reduce costs.

Q3: What is A350 LF2 material suitable for?

A: A350 LF2 low-temperature carbon steel has excellent low-temperature impact toughness, ideal for cryogenic, offshore and winter cold area pipeline projects.