Weco® wing unions are the most complete line of standard and sour gas pipe connectors available, ranging in size from 1 inch to 12 inches with cold working pressures to 20,000 psi. All Weco® unions are color coded for quick identification. Materials meet ASTM and AISI standards.
Weco® wing union seals vary according to pressure and application. All wing unions provide positive, pressure-tight sealing.
For low-pressure services (1,000 to 2,000 psi), the spherical surface of the male sub and the conical surface of the female sub form a metal-to-metal seal. This ball-and-cone seal remains leak-proof even when one surface is slightly pitted or misaligned.
Most medium-pressure models (2,000 to 4,000 psi) supplement the metal-to-metal seal with a resilient O-ring in the male sub. Weco high-pressure unions (6,000 to 20,000 psi) feature a replaceable, lip-type seal ring in the female sub. This primary seal protects the secondary metal-to-metal seal from abrasion and corrosion while minimizing flow turbulence.
The Weco® nonpressure-thread seal option is designed for abrasive, high-pressure applications where welded connections are undesirable.
Three-lug nuts and rugged self-locking ACME threads provide fast make-up and break-out regardless of position or space restrictions. No special tools are required.
Weco® standard service wing unions are color coded for quick identification. Sour gas wing unions are stamped "sour gas" using low-stress dot stamping and painted with a green, zinc-chromate colored primer unique to sour gas equipment.
All Weco® parts of the same size, pressure rating, and figure number are interchangeable. This feature makes it easy to match male and female subs that are frequently made-up and broken-out. And, because FMC Technologies makes every Weco® wing union to the same rigid standards, you get a quick and positive seal every time.
Weco® unions are produced using the finest raw materials, tooling procedures, and heat-treating techniques available. Each union is carefully inspected to assure long, dependable service in the most extreme conditions.
Weco® wing unions, like all pressure containing equipment, require special care and use. See section on warnings and safety Instructions.
- Positive sealing designs
- Fast make-up and break-out
- Inter-changeable parts
- Choice of end connections
- Non-pressure seal connection