Three-piece hammer (wing) union for high-pressure oilfield and industrial lines: male sub, female sub and an ACME hammer-lug nut. Available with line pipe thread or butt-weld ends, in Figures from 500 psi to 20,000 psi cold working pressure.
Prices on request. Contact us for availability and quotations.
A hammer union is a three-piece screwed joint for high-pressure lines: a male sub, a female sub and a hammer-lug nut running on an ACME thread. The nut is struck with a hammer to pull the subs together, giving a joint that can be broken and remade repeatedly in the field without flanges or bolting. Line pipe threads and butt-weld ends are both standard.
The Figure number, not the size, fixes the pressure class. Parveen Industries publishes Fig 50 at 500 psi cold working pressure, Fig 100 at 1,000 psi, Fig 200 and Fig 206 at 2,000 psi, Fig 400 at 4,000 psi, Fig 600 and Fig 602 at 6,000 psi, Fig 1002, 1003 and 1004 at 10,000 psi, Fig 1502 at 15,000 psi and Fig 2002 at 20,000 psi, over sizes 1 to 12 inch. Two of those classes drop with size and the quick-reference table does not show it: Fig 400 is 2,500 psi from 5 to 8 inch, and Fig 1003 is 7,500 psi in 4 and 5 inch. Sour-service ratings are lower again: Fig 1002 drops to 7,500 psi and Fig 1502 to 10,000 psi. Sour-service unions built to NACE MR-01-75 and API RP-14E are painted olive green and stamped NACE.
Sealing changes with the class. Low-pressure figures seal metal to metal on the conical and spherical faces of the subs; medium-pressure figures add an O-ring on the male sub; high-pressure figures use a replaceable lip-type seal ring in the female sub, in Viton for sour service. Figures are also colour coded - Fig 200 and 206 blue nut with grey subs, Fig 400 black nut with red subs, Fig 602 black nut with orange subs, Fig 1002 red nut with blue subs, Fig 1502 blue nut with pink subs - but colour is a maker convention and must never be relied on by itself.
When ordering, state the Figure number, the nominal size, standard or sour service, and the end preparation. Subs and nuts of different Figures must never be mixed: several Figures share dimensions closely enough to assemble while carrying entirely different pressure ratings.
| Union Type | Three-piece hammer (wing) union: male sub, female sub and hammer-lug nut on an ACME thread |
|---|---|
| Size Range | 1 to 12 inch |
| Figure Designations | Fig 50, 100, 200, 206, 207, 211, 400, 600, 602, 1002, 1003, 1004, 1502, 2002 and 2202. The Figure fixes the pressure class and must be stated when ordering. |
| Pressure Rating | Standard service cold working pressure by Figure: Fig 50 = 500 psi, Fig 100 = 1,000 psi, Fig 200/206/207/211 = 2,000 psi, Fig 400 = 4,000 psi but 2,500 psi in 5 - 8 inch, Fig 600/602 = 6,000 psi, Fig 1002/1004 = 10,000 psi, Fig 1003 = 10,000 psi but 7,500 psi in 4 and 5 inch, Fig 1502 = 15,000 psi, Fig 2002 = 20,000 psi. Sour service: Fig 400 = 2,500 or 4,000 psi, Fig 602 = 6,000 psi, Fig 1002/1003/1004 = 7,500 psi, Fig 1502 = 10,000 psi, Fig 2202 = 15,000 psi. |
| End Connections | Line pipe thread or butt weld; NPTS additionally offered on Fig 602, Fig 1002 and Fig 1502 |
| Sealing | Metal-to-metal conical and spherical seal on low-pressure figures; O-ring on the male sub at medium pressure; replaceable lip-type seal ring in the female sub at high pressure; Viton seals for sour service |
| Sour Service | Sour Service unions manufactured to NACE MR-01-75 and API RP-14E, painted olive green and stamped NACE. Line pipe threads on Fig 1002 and Fig 1502 above 4 inch are not recommended for sour service. |
| Colour Coding | Fig 50 orange nut and subs; Fig 100 black nut, yellow subs; Fig 200/206 blue nut, grey subs; Fig 400 black nut, red subs; Fig 602 black nut, orange subs; Fig 1002 red nut, blue subs; Fig 1003 black nut, green subs; Fig 1004 red nut, grey subs; Fig 1502 blue nut, pink subs; Fig 2002 green nut, grey subs |
| Interchange | Built to the industry Figure designations and interchangeable with WECO and other makers working to the same designations |
