API 5L Line Pipe Specifications for these pipes regulate usage for Grade A and Grade B pipes.ASME flanges are commonly used in industrial process systems handling water, steam, air and gas. API flanges are manufactured for high strength operating refinery systems with products such as oil and explosive gases.API 6A is the API Standard for oil and gas wellhead equipment such as gate valves.
We can supply API 6A flange according with ASTM A350 LF2 that your company needs for use in the oil or natural gas industries.The flanges collocated with in API 5L X52, X56, X60, X65 and X70 as follows:
1/2" to 24" in 150lbs, 300lbs and 600lbs
1/2" to 8" in 1500lbs
Other sizes quickly available from mill stock.
ASTM material standards include:
A350 LF 1/LF2 / 1LF3
A694 F42 F52 F56 / F60 / F65 / F70
A182 F316L /F51 /F55
The flange standards API 6A and ASME/ANSI B16.5 have the same dimensions - but the API 6A flanges are rated for higher pressures as indicated below:
API vs. ASME/ANSI Flanges with the same Dimensions:
Pressure Class Rating (psi)
Weld neck flange