Petrochemical

Coastal Flange supplies various industries including petrochemical and processing, oil and gas, and water works. Petrochemical and refineries utilize pipe flanges for crude oil and natural gas applications. Petrochemical refineries use a wide variety of industrial flange types for the distillation of crude oil, petroleum gasses, and assorted chemicals consumed by the industry.

The petrochemical trade refers to the American Society of Mechanical Engineers (ASME) and American National Standards Institute (ANSI) committees for guidance and specifications. ASME/ANSI B16.5 is universally recognized for a diverse assortment of applications. Commonly used materials include carbon, stainless, and alloy steels. Pressure classes range from 150 to 2500 class ratings. Flange faces are usually raised-face (RF), flat-faced (FF), and ring-type joint (RTJ).

The top 3 Flanges used in the petrochemical industry are weld necks, slip-ons, and blinds:

Weld Neck

Weld neck flanges are installed by welding the pipe to the neck of the flange. This allows for the transfer of stress from the flange to the pipe itself. This also reduces high-stress concentrations at the base of the hub.

Slip-on

Slip-on flanges as described by its name, slides over the pipe. They are typically machined with an inside diameter slightly larger than the outside diameter of the pipe. This allows the flange to slide over the pipe, but still maintain a snug fit. Slip-ons are secured to the pipe with a filet weld at the top and bottom of the flange.

Blind

Blind flanges are used to seal the end of a piping system or pressure vessel openings to prevent flow. They are used for testing the flow of liquid or gas through a pipe or vessel. They allow for an easy access in the event that work must be done inside the line.

ANSI Flanges

ASME Flanges

AWWA Flanges

Industry Standard Flanges

Custom Engineered Flanges

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