BS 1387-1985 Steel Tubes and Tubulars Suitable for Screwing to BS 21 Pipe Threads

Nominal Pipe Size		Wall Thickness			Outside Diameter						Unit Weight of galvanized pipe (kg)						Screw Thread
					Max.			Min.			Plain End			Screwed and Socketed
DN	NPS	L	M	H	L	M	H	L	M	H	L	M	H	L	M	H	Threads	Total length
15	1/2	2.0	2.6	3.2	21.4	21.7	21.7	21.0	21.1	21.1	0.99	1.27	1.50	1.00	1.28	1.51	14	11.4-15
20	3/4	2.3	2.6	3.2	26.9	27.2	27.2	26.4	26.6	26.6	1.44	1.63	1.94	1.45	1.64	1.95	14	12.7-16.3
25	1	2.6	3.2	4.0	33.8	34.2	34.2	33.2	33.4	33.4	2.06	2.50	3.03	2.08	2.52	3.05	11	14.5-19.1
32	1-1/4	2.6	3.2	4.0	42.5	42.9	42.9	41.9	42.1	42.1	2.64	3.22	3.92	2.67	3.25	3.95	11	16.8-21.4
40	1-1/2	2.9	3.2	4.0	48.4	48.8	48.8	47.8	48.0	48.0	3.35	3.70	4.51	3.39	3.74	4.55	11	16.8-21.4
50	2	2.9	3.6	4.5	60.2	60.8	60.8	59.6	59.8	59.8	4.23	5.21	6.36	4.30	5.28	6.44	11	21.1-25.7
65	2-1/2	3.2	3.6	4.5	76.0	76.6	76.6	75.2	75.4	75.4	5.90	6.65	8.15	6.03	6.77	8.28	11	23.2-30.2
80	3	3.2	4.0	5.0	88.7	89.5	89.5	87.9	88.1	88.1	6.94	8.64	10.58	7.11	8.81	10.78	11	26.3-33.3
100	4	3.6	4.5	5.4	113.9	114.9	114.9	113.0	113.3	-	10.06	12.59	14.88	10.32	12.90	15.18	11	32.3-39.3
125	5	-	5.0	5.4	-	140.6	140.6	-	138.7	-	-	17.06	18.31	-	17.58	18.82	11	36.6-43.6
150	6	-	5.0	5.4	-	166.1	166.1	-	164.1	-	-	20.25	21.79	-	20.87	22.40	11	36.6-43.6

 L=Light M=Medium H=Heavy