SIZE: 1/2"-36" 

CLASS: 150LB-2500LB 

Standards: 
1) Design and manufacture: API600 
2) Face to face/end to end: ANSI B16.10 
3) Flange dimensions: ANSI B16.5a 
4) Butt welding dimensions: ANSI B16.25 
5) Pressure temperature rating: ANSI B16.34 
6) Inspection and test: API598