Welding Bulkhead Union
(BBUW)

Designations	Tube O.D	d	A	Width across flat	t	ℓ	Approx.
Designations	D	d	A	H	t	ℓ	L
BBUW-06	6	4	16	14	7.0	74	95
BBUW-08	8	6	16	17	7.0	74	95
BBUW-10	10	8	19	19	7.0	74	97
BBUW-12	12	10	20	22	7.0	74	97
BBUW-15	15	12	25	27	7.5	78	103
BBUW-16	16	13	28	30	7.5	78	103
BBUW-18	18	14	28	32	8.0	78	103
BBUW-20	20	17	32	36	8.0	78	103
BBUW-22	22	18	32	36	9.0	78	103
BBUW-25	25	20	38	41	10.0	78	105
BBUW-28	28	22	39	46	10.0	82	110
BBUW-30	30	25	46	46	10.0	82	111
BBUW-32	32	26	46	50	11.0	82	111
BBUW-35	35	28	46	55	11.0	82	117
BBUW-38	38	32	55	60	12.0	82	121
BBUW-40	40	32	55	60	12.0	90	129
BBUW-50	50	40	65	75	12.0	90	133
BBUW-81	10.5 (1/8")	8	19	19	7.0	74	97
BBUW-82	13.8(1/4")	11	22	24	7.5	78	102
BBUW-83	17.3(3/8")	14	28	32	8.0	78	103
BBUW-84	21.7(1/2")	18	32	36	9.0	78	103
BBUW-85	27.2(3/4")	22	39	46	10.0	82	110
BBUW-86	34.0(1")	28	46	55	11.0	82	117
BBUW-87	42.7(1 1/4")	34	58	65	12.0	90	131
BBUW-88	48.6(1 1/2")	40	65	75	12.0	90	133