Butt Weld Cap

Nominal Pipe Size DN	GB/T12459--2005CAP Unit: mm		Length E	Limiting wall thickness for length E	Length E1
	OD at Bevel D
	I Series	II Series
15	21.3	18	25	4.57	25
20	26.9	25	25	3.81	25
25	33.7	32	38	4.57	38
32	42.4	38	38	4.83	38
40	48.3	45	38	5.08	38
50	60.3	57	38	5.59	44
65	73.0	76	38	7.11	51
80	88.9	89	51	7.62	64
90	101.6	－	64	8.13	76
100	114.3	108	64	8.64	76
125	141.3	133	76	9.65	89
150	168.3	159	89	10.92	102
200	219.1	219	102	12.70	127
250	273.0	273	127	12.70	152
300	323.9	325	152	12.70	178
350	355.6	377	165	12.70	191
400	406.4	426	178	12.70	203
450	457	480	203	12.70	229
500	508	530	229	12.70	254
550	559	－	254	12.70	254
600	610	630	267	12.70	305
650	660	－	267	--	--
700	711	720	267	--	--
750	762	－	267	--	--
800	813	820	267	--	--
a length E applied to the value of the limit wall thickness listed in column thickness does not exceed the length of the E occasion. b DN600 pipe cap length E1 applied to a thickness greater than the value of "Maximum length E wall thickness" listed in column occasions.