High-performance stainless-steel pipe unions
A pipe union is a critical fitting designed to join two pipes in a way that allows them to be detached without any horizontal movement or the need to cut the piping. Unlike a standard coupling, a union consists of three distinct parts: a male end, a female end, and a nut that provides the necessary compression to create a hermetic seal.
How a pipe union works
The operation is based on the mechanical compression of the two internal ends (conical or flat seat) through the tightening of the central nut. This design is essential in systems requiring frequent maintenance, as it allows for the easy removal of valves, pumps, or filters from the line.
Technical standards & thread finishing
Our unions are manufactured in strict accordance with international standards to guarantee safety and interchangeability:
- Design Standard: MSS SP-83 (Class 3000, 6000 and 9000 lbs).
- Threading: Available with NPT (National Pipe Thread) according to ASME B1.20.1 for self-sealing tapered connections.
- Socket Weld (SW): For high-pressure permanent joints that still require the disassembly feature of the union.
Materials & sizes available
M.E.G.A. stands out for its extensive metallurgical expertise. Our unions are available in a wide array of materials to withstand diverse corrosive and thermal environments:
- Carbon & Low-Temp Steel: Including A/SA105N (available with HDG or Galvanized finish) and A/SA350 LF2 CL1/LF3 for low-temperature service.
- Stainless Steel: A full selection including F304/L, F316/L/H, F317L, and stabilized grades like F321/H and F347.
- Alloy Steel: High-strength options for elevated temperatures, such as F5, F9, F11, F22, and F91 Type 1.
- Duplex & Super Duplex: Superior corrosion resistance via F51, F53, and F55.
- Nickel & Special Alloys: High-end solutions in Inconel (N06625), Incoloy (N08825), Monel (N04400), Hastelloy (N10276), and Cupro-Nickel (C70600).
Dimensions & Applications
Our inventory covers sizes from 1/8" to 6" (NPS). These fittings are critical components in industries such as:
- Oil & Gas, Petrochemical, and Power Generation.
- Chemical processing and Pharmaceutical plants.
- Marine and Offshore engineering.
- Heavy hydraulic systems.
Primary applications
Due to their forged strength and the sanitary properties of stainless steel, these fittings are widely used in:
- Oil & Gas and Petrochemical plants.
- Chemical processing and Pharmaceutical industries.
- High-pressure hydraulic systems.
- Food & Beverage production lines.
Why choose M.E.G.A. as your supplier?
Choosing M.E.G.A. S.p.A. means relying on over 50 years of excellence in the forging industry. Our values lie in the complete control of the production cycle: from the initial forging to final testing in our Italian facilities. We don't just supply fittings; we provide certified reliability, high-performance materials, and a technical support team capable of addressing the most complex engineering challenges in the energy and industrial sectors.
