... surface such as FF, RF, LJ, FM, R.T.J ,R.J. Our products have been widely used in many fields both at ... fully automated production so as to offer the Best Quality Products and Prompt Services to our Clients. Grade and Material: ASTM ... on. Sealing surface: FF, RF, LJ, FM, R.T.J , R.J and so on. Application: The stainless steel flanges are widely ...