National Oilwell Varco's offers a full line of ANSON Hammer Lug Unions available in butt weld, threaded or sour gas. All unions are interchangeable with other leading manufactures' unions and are readily available from stock.
SOUR GAS UNIONS
NOV's line of ANSON Hammer Lug Unions are available in Hydrogen Sulphide trim (Sour Gas, H2S) with either Threaded or Butt Weld ends. Sour Gas Unions are manufactured in accordance with NACE Standard MR-01-75 (Latest Revision). All unions are subjected to rigorous inspection checks throughout manufacture. Sour Gas unions have their batch numbers prefixed by the letters S G and, for ease of identification, are painted olive green.
Note: Most unions for Sour Gas Service are pressure de-rated.
BUTT WELD UNIONS
NOV's line of ANSON Hammer Lug Unions are available in all Fig. Numbers as Butt Weld unions as an alternative to the Standard API threaded end. The only exception to this being the Fig. 50 which is available as Socket Weld only. When ordering Butt Weld unions please state the Pipe Schedule required.
A full range of API Line Pipe Threaded Unions are available from Fig. 50 through to Fig. 1502. Threads are gauged with calibrated working API gauges which, in turn, are checked regularly with API master gauges. In addition, unions with BSP or NPT threads can be supplied upon request.
In addition to the wide range of Hammer Lug Unions shown, NOV regularly manufactures specials to suit customers’ specific requirements in regards to materials, dimensions and types.
NOV's line of ANSON Lip and ‘O’ Ring type Seals are available for Standard Service in Nitrile and for Sour Gas Service in Fluoroelastomer. Manufacture is closely monitored to guarantee the correct shore hardness and composition. Sour Gas ‘Superseals’ are molded in special materials to resist explosive decompression for safety and reliability.