The standard ASME B16.9 pipe fitting is often found in the product description, it covers the dimensions,tolerance, testing for factory-made wrought butt welding fittings. Related products include elbows,tees, crosses, lap joint stub ends, caps and reducers. 

The size is from 1/2 inch to 48 inch(DN15-DN1200), including seamless pipe fittings & welded pipe fittings. Material shall be in accordance with ASTM A234, A403, A420, A815,B316, B363 etc. 

About ends, there are plain bevel and compound bevel. It depends on Nominal wall thickness. If thickness is more than 22mm, end preparation will be compound bevel.

If the customers have special requirement on sizes or specifications, they shall be made by agreements between manufacturer and purchaser.