We are offering rtj blind flanges type: rtj blind flange, ring type jiont (rtj) blind flangematerials: astm a105a350 lf1, lf2 cl1cl2, lf3 cl1cl2a516.60a694 (f42, f46, f48, f50, f52, f56, f60, f65, f70)a182 f304304l, f316316l, f316h, f310, f321a182 f11, f22, standards: api, ansi, bs, jis, uni, din, en1092-1pressure: ansi class 150 to 2, 500size range: 12 to 56 inches (dn 15 to dn 1400)used in: oil field, offshore, water system, shipbuilding, natural gas, electric power, pipe projects, etc.