United Oilfield Services
112 Block CVL10, Sharjah
Email: info@unitedoilindustrials.com

Flange Specifications

UnitedFlange Specifications

Flange Specifications

Several governing specifications exist for a wide variety of industrial steel flanges, and each have their own suitability for our customers’ applications. Here at United Oilfield, our most popular product lines include ASME/ANSI flanges, API flanges, AWWA flanges, and DIN flanges. Let’s dive a bit deeper below.

ANSI/ASME

The current ANSI / ASME flange specifications of B16.5 and B16.47 trace their roots to the old B16.1 specification from decades past, which consisted primarily of cast iron.

DIN

The subset flanges under the DIN standard consist of the same style of flanges in the United States, including the most commonly used slip on flanges, weld neck, flanges, and blind flanges.

API

The API 6A specification is a standard developed for the American Petroleum Institute and shares many characteristics with ASME flanges. They are similar in dimensions, but their minimum design requirements for working pressure begin in the class 2000.

JIS

Japan Industrial Standard is yet another option for metric sizes. Provided in JIS5K, JIS10K, JIS15K, and JISK20K pressure classes, we can offer Slip On, Blind, and Weld Neck varieties in Raised Face or Flat Face configurations.

AWWA

The American Water Works Association specification C207 provides flanges mostly of the plate variety and for use in low pressure and low temperature applications.

Boiler Code Flanges

We continue to offer replacements for legacy systems or new applications that don’t require B16.47 or AWWA flanges. Note that the Blinds are provided “to match” either slip on or weld neck flanges.

Flange Specification and Identification

  1. Flange Types and Facings: Flanges are categorized based on types like ‘weld-neck RTJ’ or ‘socket-weld RF,’ along with corresponding RTJ gasket dimensions per ASME B16.5 standards.
  2. Standards: Fundamental flange dimensions adhere to ASME B16.5, BS 1560, DIN, or API 6A.
  3. Nominal Pipe Size (NPS): NPS is a dimensionless label that defines the nominal size of pipes, fittings, or nozzles, denoted as NPS 4 or NPS 6.
  4. mples include Classes 150, 300, 900, and 1500.
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United Oilfield gives commitment to excellence and a focus on precision, we deliver flanges and pipe fittings that meet the highest standards.

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Locations
Sharjah Office: 112 Block CVL10, Sharjah, UAE 66636
Dubai Office: Rolex Tower Floor 9 DIFC, Sheikh Zayed Road, Dubai
Warehouse: Warehouse 4, Umm Al Queen Indl. Area

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