What is an API flange?

API flanges are manufactured to resist corrosion, pitting, and cracking due to the stress of caustic solutions they are exposed to. This makes API flanges the only choice for refineries that handle substances such as oil and explosive gases, which require high pressure and temperature tolerances.

What is a flange on a tank?

Tank flanges are flanges most commonly used to connect a pipe to a vessel or tank of some kind. They can also be used to connect two pipes together. Aluminum or forged steel weld on tank flanges each need to be welded on to tanks of their corresponding material.

What are the dimensional standards for flanges?

ANSI standard flange dimensions are designated as 150, 300, 400, 600, 900, 1500, and 2500, in sizes NPS 1/2 through NPS 24. Regardless of size or specification, flanges are fundamentally designed to close, cover, connect, or support pipe systems.

What is the difference between ASME and API?

The difference between ASME/ANSI and API is the fabrication material and a higher rated API operating pressure. ASME/ANSI flanges are commonly used in industrial process systems handling water, steam, air and gas.

What size are flange bolts?

Flange bolts are partially and fully threaded depending on size and length. The point for hex types is chamfered or rounded; for 12 point, it’s flat and chamfered. Typical sizes for hex range from 3/8″ to 3/4″; #10 to 1/2″ for serrated hex; and 1/4″ to 1″ in diameter for 12 point.

What does API 510 stand for?

Pressure Vessel Inspection Code
API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration, is an inspection code developed and published by the American Petroleum Institute (API).

Is ANSI B16 5 the same as as B16 5?

The term “B16. 5” or “B16 5” is used interchangeability and refers to same standard. However, the standard ASME B16 5 (ANSI B16 5) only covers size up to 24 inches.