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Threaded Union

Forged threaded unions are essential components in the piping industry, designed to provide a secure connection between two pipes while allowing easy assembly and disassembly. These fittings are widely used in small-diameter piping systems that require a reliable seal under varying pressure and temperature conditions. Manufactured in compliance with international standards such as ASTM A182 and ASME B16.11, threaded unions are available in a wide range of materials, including stainless steel, carbon steel, duplex steel, and high nickel alloys. Their precision-engineered design ensures leak-free performance and long service life, making them highly sought after in industries like oil and gas, petrochemicals, and power generation.

A wide variety of threaded unions are manufactured, including forged screwed unions, socket weld unions, and MSS SP-79 unions. Depending on the application, these unions are available in materials like stainless steel, duplex steel, copper-nickel alloys, Hastelloy, Inconel, and other special alloys. Each material offers unique advantages such as corrosion resistance, strength, or thermal stability, ensuring that the right solution is available for different industrial environments. These unions are rigorously tested for durability, dimensional accuracy, and pressure handling capability, ensuring they meet stringent quality standards.

One of the key advantages of threaded unions is their ease of installation and maintenance. Unlike welded connections, they allow pipes to be disconnected and reconnected without disturbing the rest of the piping system. This makes them particularly useful in applications that require frequent maintenance or inspection. Additionally, their compact design ensures they can be used in confined spaces, further enhancing their versatility. For industries that deal with aggressive fluids or high-pressure conditions, threaded unions made from high nickel alloys and duplex steels provide excellent performance and reliability.

These threaded pipe fittings are supplied in various sizes and pressure ratings to suit different project requirements. They are widely used in refineries, chemical processing plants, water treatment facilities, marine applications, and other critical infrastructure. Export-quality forged threaded unions are in demand across international markets such as Qatar, Saudi Arabia, UAE, Indonesia, Singapore, Malaysia, Turkey, Russia, Ukraine, South Africa, Australia, and the United States. Their global acceptance highlights their proven reliability and superior engineering.

In addition to standard dimensions, customized threaded unions can be manufactured to meet specific requirements. Whether it is a high-performance Inconel screwed union, a corrosion-resistant copper-nickel threaded union, or a duplex steel socket weld union, these fittings are designed to provide robust solutions for diverse industrial challenges. Their durability, sturdy construction, and resistance to wear make them a preferred choice for engineers and project managers seeking long-lasting, maintenance-friendly piping solutions.

Threaded Union Specification

Threaded Union

Threaded Union Material & Grades:-

Stainless Forged Threaded Unions:

ASTM A182 F304, F304L, F306, F316L, F304H, F309S, F309H, F310S, F310H, F316TI, F316H, F316LN, F317, F317L, F321, F321H, F11, F22, F91, F347, F347H, F904L, ASTM A312/A403 TP304, TP304L, TP316, TP316L

Alloy Steel ForgedThreaded Unions:

ASTM / ASME A 182, ASTM / ASME A 335, ASTM / ASME A 234 GR P 1, P 5, P 9, P 11, P 12, P 22, P 23, P 91, ASTM / ASME A 691 GR 1 CR, 1 1/4 CR, 2 1/4 CR, 5 CR, 9CR, 91

Carbon Steel ForgedThreaded Unions:

ASTM/ ASME A 105, ASTM/ ASME A 350 LF 2, ASTM / ASME A 53 GR. A & B, ASTM A 106 GR. A, B & C. API 5L GR. B, API 5L X 42, X 46, X 52, X 60, X 65 & X 70. ASTM / ASME A 691 GR A, B & C

Duplex & Super Duplex Steel Forged Threaded Unions:

ASTM A 182 – F 51, F53, F55 S 31803, S 32205, S 32550, S 32750, S 32760, S 32950.

Nickel Alloy Forged Threaded Unions:

ASTM / ASME SB 336, ASTM / ASME SB 564 / 160 / 163 / 472, UNS 2200 (NICKEL 200), UNS 2201 (NICKEL 201), UNS 4400 (MONEL 400), UNS 8020 (ALLOY 20 / 20 CB3), UNS 8825 (INCONEL 825), UNS 6600 (INCONEL 600), UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 10276 (HASTELLOY C 276).

Premium Quality Threaded Union – Engineered for Precision and Performance

Threaded unions are available in a wide size range from 1/4″ NB to 4″ NB, making them suitable for various small to medium piping applications. These fittings are manufactured in accordance with ASTM A182 and ASTM SA182 standards, ensuring high-quality material strength and durability. They follow precise dimensional specifications such as ASME 16.11, MSS SP-79, MSS SP-95, 83, 95, 97, and BS 3799, which guarantee compatibility and interchangeability with global piping systems.

Designed for high-pressure applications, threaded unions are offered in different pressure classes including 2000 LBS, 3000 LBS, 6000 LBS, and 9000 LBS, providing reliable performance under varying operating conditions. They come in different thread types such as Screwed-Threaded NPT, BSP, and BSPT, ensuring secure and leak-free connections. These fittings are available in various forms like standard unions, union male, and union female, catering to diverse industrial needs with ease of installation and maintenance.

Standard Specifications of Threaded Unions

Threaded unions are designed to meet strict international standards, ensuring durability and precision. They are available in sizes ranging from 1/4″ NB to 4″ NB, making them ideal for small and medium piping systems. These fittings are manufactured in compliance with ASTM A182 and ASTM SA182 material standards, while their dimensions follow ASME 16.11, MSS SP-79, MSS SP-95, MSS SP-83, MSS SP-97, and BS 3799. Such adherence to standards guarantees reliable performance, compatibility, and interchangeability across various industrial applications.

Pressure Ratings and Types

These unions are offered in multiple pressure classes such as 2000 LBS, 3000 LBS, 6000 LBS, and 9000 LBS, ensuring safe operation under different working conditions. They are available with Screwed-Threaded NPT, BSP, and BSPT end connections, providing secure and leak-proof joints. Depending on the piping requirement, they are supplied in different forms, including standard unions, male unions, and female unions, making them highly versatile for installation, maintenance, and repair in diverse industries.