外径D ／mm	壁厚S／mm
	3.0	3.25	3.5	3.75	4．O	4.5	5.0	5.5	6.0	7．O	8.0	10.0	12．O
	理论质量／(kg／m)
48	3.33	3.59	3.84	4.09	4.43	4.83	5.30
60	4.22	4.55	4.88	5.20	5.52	6.16	6.78	7.39	7.99
76	5.40	5.83	6.26	6.68	7.10	7.93	8.75	9.58	lO．36	11.9l
89	6.36	6.87	7.38	7.88	8.38	9.38	10.36	11.33	12.28	14.15
102	7.32	7.9l	8.50	9.09	9.67	10.82	11.96	13.09	14.20	16.40
114	8.2l	8.88	9.54	10.19	10.85	12.15	13.44	14.72	15.98	18.47
140			11.78	12.60	13.42	15.04	16.65	18.24	19.83	22.96
159			13.42	14.36	15.29	17.14	18.99	20.82	22.64	26.24
168			14.20	15.19	16.18	18.14	20.10	22.04	23.97	27.79	3l.56
194					18.74	21.03	23.30	25.57	27.82	32.28	36.69
219					21.21	23.80	26.39	28.96	31.52	36.60	41.63
245					23.77	26.69	29.59	32.48	35.36	41.08	46.76
273					26.53	29.80	33.04	36.28	39.51	45.92	52.28
324					31.56	35.45	39.33	43.20	47.05	54.72	62.34
355.5						38.95	43.22	47.47	51.7l	60.16	68.55
377						41.37	45.87	50.39	54.89	63.87	72.80
406.5						44.60	49.50	54.39	59.26	68.96	78.62	97.78
457							55.73	61.24	66.73	77.68	88.58	110.23
508								68.15	74.28	86.48	98.64	122.8l	146.78

外  径	外径允许偏差	壁  厚	壁厚允许偏差
D<76	+O．70 -0.10	3．O～12.0	+12.5 ％一10
76≤D≤114	+1.0 ％-O．2
D>114	±O．8％