Socket Weld OutletHole Size = Full inside diameter of outlet size.Pipe threads complying with a national or international pipe threads standard.Butt welding ends complying with national and international standard. Dimensions Application Pipe type Nominal Outlet Nominal Header Length (L2) Socket Length (L1) mm/inch Outside Diameter (D1) mm/inch Inside Diameter (D2) mm/inch Inside Diameter (D3 mm/inch mm inch mm inch mm inch 10 3/8 25 1" 27 1.063" 9.6/0.377 21.3/0.838 Carbon Steel Pipe S/40 I.D.S/80 I.D."Stainless Steel PipeS/20S I.D.S/40S I.D.S/80S I.D." 17.8/0.70 SPPS KSD3562 (JIS G 3454)STS KSD3576ASTM A53-BASTM A106-BASTM A312-TP304 32 1-1/4" 27 1.063" 40 1-1/2" 27 1.063" 50 2" 27 1.063" 65 2-1/2" 27 1.063" 80 3" 27 1.063" 100 4" 27 1.063" 125 5" 27 1.063" 150 6" 27 1.063" 200 8" 27 1.063" 15 1/2 25 1" 27 1.063" 9.6/0.377 26.4/1.039 22.2/0.874 32 1-1/4" 27 1.063" 40 1-1/2" 27 1.063" 50 2" 27 1.063" 65 2-1/2" 27 1.063" 80 3" 27 1.063" 100 4" 27 1.063" 125 5" 27 1.063" 150 6" 27 1.063" 200 8" 27 1.063" 20 3/4 25 1" 27 1.063" 12.7/0.5 31.8/1.251 27.7/1.07 32 1-1/4" 27 1.063" 40 1-1/2" 27 1.063" 50 2" 27 1.063" 65 2-1/2" 27 1.063" 80 3" 27 1.063" 100 4" 27 1.063" 125 5" 27 1.063" 150 6" 27 1.063" 200 8" 27 1.063" 25 1 25 1" 27 1.063" 12.7/0.5 39.5/1.555 Carbon Steel Pipe S/40 I.D.S/80 I.D."Stainless Steel PipeS/20S I.D.S/40S I.D.S/80S I.D." 34.5/1.358 SPPS KSD3562 (JIS G 3454)STS KSD3576ASTM A53-BASTM A106-BASTM A312-TP304 32 1-1/4" 27 1.063" 40 1-1/2" 27 1.063" 50 2" 27 1.063" 65 2- 1/2 27 1.063" 80 3" 27 1.063" 100 4" 27 1.063" 125 5" 27 1.063" 150 6" 27 1.063" 200 8" 27 1.063" 32 1-1/4 32 1-1/4" 35 1.375" 12.7/0.5 48.3/1.90 43.2/1.70 40 1-1/2" 35 1.375" 50 2" 35 1.375" 65 2-1/2" 35 1.375" 80 3" 35 1.375" 100 4" 35 1.375" 125 5" 35 1.375" 150 6" 35 1.375" 200 8" 35 1.375" 40 1-1/2 40 1-1/2" 41.5 1.625" 12.7/0.5 54.5/2.145 49.1/1.933 50 2" 41.5 1.625" 65 2-1/2" 41.5 1.625" 80 3" 41.5 1.625" 100 4" 41.5 1.625" 125 5" 41.5 1.625" 150 6" 41.5 1.625" 200 8" 41.5 1.625" 50 2 50 2" 44.5 1.75" 15.9/0.625 66.3/2.61 61.1/2.405 65 2-1/2" 44.5 1.75" 80 3" 44.5 1.75" 100 4" 44.5 1.75" 125 5" 44.5 1.75" 150 6" 44.5 1.75" 200 8" 44.5 1.75" 65 2-1/2 65 2-1/2" 56 2.215" 15.9/0.625 82/3.228 77.1/3.035 80 3" 56 2.215" 100 4" 56 2.215" 125 5" 56 2.215" 150 6" 56 2.215" 200 8" 56 2.215"