• Parveen Industries Private Limited

Hammer unions

Mumbai-based Parveen Industries Private Limited manufactures hammer unions from raw materials in the form of forgings or castings in accordance with service requirements in sizes 1 to 12" with ratings up to 20,000 PSI cold working pressure. The conical and spherical surfaces of the female and male subs respectively form and effective metal-to-metal seal in case of low pressure services. For medium pressure mostly a nitrile "O" ring is provided in the male sub in addition to the metal-to-metal seal. For high pressure a lip type seal ring of nitrile is provided for primary seal in the female sub. The seal protects the secondary metal-to-metal seal from corrosion and limits fluid flow turbulence. For sour service applications, Viton seals are provided. Hammer unions come with different end connections such as line pipe, Butt weld, and NPTS. The ranges of cold working pressure and test pressure for standard service are 1,000-20,000 and 1,500-30,000 and they are 2,500-15,000 and 3,750-22,500 for sour service. These are produced by selecting the correct raw materials and putting them to correct heat-treatment. This ensures longer life of the products in extreme conditions. Unions for sour gas service are manufactured in accordance with NACE MR-01-75 and API RP-14E.