Backing Rings

Backing Rings Table D

Nominal Steel Pipe Size for bolt on to PE stub flange

(Inches)	(mm)	Pipe OD	Part Number (Galvanised)	Part Number (SS316)	K	D	A	T	S	No. of Bolt Holes	Bolt Size
½	15	20	BRDE020	BRDE020SS	67	95	32	6	14	4	M12
¾	20	25	BRDE025	BRDE025SS	73	100	37	6	14	4	M12
1	25	32	BRDE032	BRDE032SS	83	115	44	6	14	4	M12
1¼	32	40	BRDE040	BRDE040SS	87	120	52	6	14	4	M12
1½	40	50	BRDE050	BRDE050SS	98	135	62	8	14	4	M12
2	50	63	BRDE063	BRDE063SS	114	150	78	8	18	4	M16
2½	65	75	BRDE075	BRDE075SS	127	165	92	8	18	4	M16
3	80	90	BRDE090	BRDE090SS	146	185	108	10	18	4	M16
4	100	110	BRD110	BRD110SS	178	215	128	10	18	4	M16
5	125	125	BRD125	BRD125SS	210	255	140	13	18	8	M16
5	125	140	BRD140	BRD140SS	210	255	158	13	18	8	M16
6	150	160	BRD160	BRD160SS	235	280	178	13	18	8	M16
6	150	180	BRD180	BRD180SS	235	280	195	13	18	8	M16
8	200	200	BRD200	BRD200SS	292	335	235	13	18	8	M16
8	200	225	BRD225	BRD225SS	292	335	240	13	18	8	M16
10	250	250	BRD250	BRD250SS	356	405	290	16	22	8	M20
10	250	280	BRD280	BRD280SS	356	405	300	16	22	8	M20
12	300	315	BRD315	BRD315SS	406	455	345	19	22	12	M20
14	350	355	BRD355	BRD355SS	470	525	376	22	26	12	M24
16	400	400	BRD400	BRD400SS	521	580	430	22	26	12	M24
18	450	450	BRD450	BRD450SS	584	640	480	25	26	12	M24
20	500	500	BRD500	BRD500SS	641	705	533	29	26	16	M24
22	550	560	BRD560	BRD560SS	699	760	590	32	30	16	M27
24	600	630	BRD630	BRD630SS	756	825	660	32	30	16	M27
28	700	710	BRD710	BRD710SS	845	910	745	35	30	20	M27
32	800	800	BRD800	BRD800SS	984	1060	835	41	36	20	M33
36	900	900	BRD900	BRD900SS	1092	1175	950	48	36	24	M33
40	1000	1000	BRD1000	BRD1000SS	1175	1255	1035	51	36	24	M33
48	1200	1200	BRD1200	BRD1200SS	1410	1490	1240	60	36	32	M33
56	1400	1400	BRD1400	BRD1400SS	1615	1700	1460	60	36	36	M33
64	1600	1600	BRD1600	BRD1600SS	1825	1910	1660	64	39	40	M36
72	1800	1800	BRD1800	BRD1800SS	2019	2110	1860	73	42	44	M39
80	2000	2000	BRD2000	BRD2000SS	2250	2345	2060	76	42	44	M39

Backing Rings Table E

Nominal Steel Pipe Size for bolt on to PE stub flange

(Inches)	(mm)	Pipe OD	Part Number (Galvanised)	Part Number (SS316)	K	D	A	T	S	No. of Bolt Holes	Bolt Size
½	15	20	BRDE020	BRDE020SS	67	95	32	6	14	4	M12
¾	20	25	BRDE025	BRDE025SS	73	100	37	6	14	4	M12
1	25	32	BRDE032	BRDE032SS	83	115	44	7	14	4	M12
1¼	32	40	BRDE040	BRDE040SS	87	120	52	8	14	4	M12
1½	40	50	BRDE050	BRDE050SS	98	135	62	9	14	4	M12
2	50	63	BRDE063	BRDE063SS	114	150	78	10	18	4	M16
2½	65	75	BRDE075	BRDE075SS	127	165	92	10	18	4	M16
3	80	90	BRDE090	BRDE090SS	146	185	108	12	18	4	M16
4	100	110	BRE110	BRE110SS	178	215	128	13	18	8	M16
5	125	125	BRE125	BRE125SS	210	255	140	14	18	8	M16
5	125	140	BRE140	BRE140SS	210	255	158	14	18	8	M16
6	150	160	BRE160	BRE160SS	235	280	178	17	22	8	M20
6	150	180	BRE180	BRE180SS	235	280	195	17	22	8	M20
8	200	200	BRE200	BRE200SS	292	335	235	19	22	8	M20
8	200	225	BRE225	BRE225SS	292	335	240	19	22	8	M20
10	250	250	BRE250	BRE250SS	356	405	290	22	22	12	M20
10	250	280	BRE280	BRE280SS	356	405	300	22	22	12	M20
12	300	315	BRE315	BRE315SS	406	455	345	25	26	12	M24
14	350	355	BRE355	BRE355SS	470	525	376	29	26	12	M24
16	400	400	BRE400	BRE400SS	521	580	430	32	26	12	M24
18	450	450	BRE450	BRE450SS	584	640	480	32	26	16	M24
20	500	500	BRE500	BRE500SS	641	705	533	38	26	16	M24
22	550	560	BRE560	BRE560SS	699	760	590	44	30	16	M27
24	600	630	BRE630	BRE630SS	756	825	660	48	33	16	M30
28	700	710	BRE710	BRE710SS	845	910	745	51	33	20	M30
32	800	800	BRE800	BRE800SS	984	1060	835	54	36	20	M33
36	900	900	BRE900	BRE900SS	1092	1175	950	64	36	24	M33
40	1000	1000	BRE1000	BRE1000SS	1175	1255	1035	67	39	24	M36
48	1200	1200	BRE1200	BRE1200SS	1410	1490	1240	79	39	32	M36

Backing Rings Table F

Nominal Steel Pipe Size for bolt on to PE stub flange

(Inches)	(mm)	Pipe OD	Part Number (Galvanised)	Part Number (SS316)	K	D	A	T	S	No. of Bolt Holes	Bolt Size
2	50	63	BRF063	BRF063SS	127	165	78	16	18	4	M16
2½	65	75	BRF075	BRF075SS	146	185	92	16	18	8	M16
3	80	90	BRF090	BRF090SS	165	205	108	16	18	8	M16
4	100	110	BRF110	BRF110SS	191	230	128	22	18	8	M16
6	150	160	BRF160	BRF160SS	260	305	178	22	22	12	M20
8	200	200	BRF200	BRF200SS	324	370	235	25	22	12	M20
10	250	250	BRF250	BRF250SS	381	430	290	29	26	12	M24
12	300	315	BRF315	BRF315SS	438	490	345	32	26	16	M24
14	350	355	BRF355	BRF355SS	495	550	376	35	30	16	M27
16	400	400	BRF400	BRF400SS	552	610	430	41	30	20	M27
18	450	450	BRF450	BRF450SS	610	675	480	44	33	20	M30
20	500	500	BRF500	BRF500SS	673	735	533	51	33	24	M30
22	550	560	BRF560	BRF560SS	724	785	590	54	33	24	M30
24	600	630	BRF630	BRF630SS	781	850	660	57	36	24	M33
28	700	710	BRF710	BRF710SS	857	935	745	60	36	24	M33
32	800	800	BRF800	BRF800SS	984	1060	835	68	36	28	M33
36	900	900	BRF900	BRF900SS	1105	1185	950	76	39	32	M36

Backing Rings Table H

Nominal Steel Pipe Size for bolt on to PE stub flange

(Inches)	(mm)	Pipe OD	Part Number (Galvanised)	Part Number (SS316)	K	D	A	T	S	No. of Bolt Holes	Bolt Size
2	50	63	BRH063	BRH063SS	127	165	78	19	18	4	M16
2½	65	75	BRH075	BRH075SS	146	185	92	19	18	8	M16
3	80	90	BRH090	BRH090SS	165	205	108	22	18	8	M16
4	100	110	BRH110	BRH110SS	191	230	128	25	18	8	M16
6	150	160	BRH160	BRH160SS	260	305	178	29	22	12	M20
8	200	200	BRH200	BRH200SS	324	370	235	32	22	12	M20
10	250	250	BRH250	BRH250SS	381	430	290	35	26	12	M24
12	300	315	BRH315	BRH315SS	438	490	345	41	26	16	M24
14	350	355	BRH355	BRH355SS	495	550	376	48	30	16	M27
16	400	400	BRH400	BRH400SS	552	610	430	54	30	20	M27
18	450	450	BRH450	BRH450SS	610	675	480	60	33	20	M30
20	500	500	BRH500	BRH500SS	673	735	533	67	33	24	M30
22	550	560	BRH560	BRH560SS	724	785	590	70	33	24	M30
24	600	630	BRH630	BRH630SS	781	850	660	76	36	24	M33

Backing Rings A.N.S.I. 150#

Nominal Steel Pipe Size 

(Inches)	(mm)	Pipe OD	Part Number (Galvanised)	Part Number (SS316)	K	D	A	T	S	No. of Bolt Holes	Bolt Size
½	15	20	BRA020	BRA020SS	60.5	90	32	6	16	4	1/2″
¾	20	25	BRA025	BRA025SS	70	98	37	8	16	4	1/2″
1	25	32	BRA032	BRA032SS	79.5	108	44	8	16	4	1/2″
1¼	32	40	BRA040	BRA040SS	89	117	52	8	16	4	1/2″
1½	40	50	BRA050	BRA050SS	98.5	127	62	10	16	4	1/2″
2	50	63	BRA063	BRA063SS	120.5	152	78	10	20	4	5/8″
2½	65	75	BRA075	BRA075SS	139.5	178	92	10	20	4	5/8″
3	80	90	BRA090	BRA090SS	152	191	108	12	20	4	5/8″
4	100	110	BRA110	BRA110SS	190.5	229	128	12	20	8	5/8″
5	125	125	BRA125	BRA125SS	216	254	140	16	23	8	3/4″
5	125	140	BRA140	BRA140SS	216	254	158	16	23	8	3/4″
6	150	160	BRA160	BRA160SS	241	279	178	16	23	8	3/4″
6	150	180	BRA180	BRA180SS	241	279	195	16	23	8	3/4″
8	200	200	BRA200	BRA200SS	298.5	343	235	20	23	8	3/4″
8	200	225	BRA225	BRA225SS	298.5	343	240	20	23	8	3/4″
10	250	250	BRA250	BRA250SS	362	406	290	20	26	12	7/8″
10	250	280	BRA280	BRA280SS	362	406	300	20	26	12	7/8″
12	300	315	BRA315	BRA315SS	432	483	345	25	26	12	7/8″
14	350	355	BRA355	BRA355SS	476	535	376	28	29	12	1″
16	400	400	BRA400	BRA400SS	540	600	430	32	29	16	1″
18	450	450	BRA450	BRA450SS	578	635	480	36	32	16	11/8″
20	500	500	BRA500	BRA500SS	635	700	533	40	32	20	11/8″
22*	550*	560	BRA560	BRA560SS	692	750	590	46	35	20	11/4″
24	600	630	BRA630	BRA630SS	749	813	660	50	35	20	11/4″
28	700	710	BRA710	BRA710SS	863.5	927	745	71	35	28	11/4″
32	800	800	BRA800	BRA800SS	978	1060	835	81	41	28	11/2″
36	900	900	BRA900	BRA900SS	1085.8	1170	950	90	41	32	11/2″
40	1000	1000	BRA1000	BRA1000SS	1200.2	1290	1030	90	41	36	11/2″
48	1200	1200	BRA1200	BRA1200SS	1422.5	1510	1235	108	41	44	11/2″
56	1400	1400	BRA1400	BRA1400SS	1651	1745	1460	125	48	48	13/4″

Backing Rings A.N.S.I. 300#

Nominal Steel Pipe Size

(Inches)	(mm)	Pipe OD	Part Number (Galvanised)	Part Number (SS316)	K	D	A	T	S	No. of Bolt Holes	Bolt Size
2	50	63	BRA063300	BRA063300SS	127	165.2	78	22.3	19	8	5/8″
2½	65	75	BRA075300	BRA075300SS	149.2	190.6	92	25.5	22.2	8	3/4″
3	80	90	BRA090300	BRA090300SS	168.2	209.6	108	28.6	22.2	8	3/4″
4	100	110	BRA110300	BRA110300SS	200	254.1	128	31.8	22.2	8	3/4″
6	150	160	BRA160300	BRA160300SS	269.8	317.6	178	36.5	22.2	12	3/4″
8	200	200	BRA200300	BRA200300SS	330.2	381.1	235	41.3	25.4	12	7/8″
10	250	250	BRA250300	BRA250300SS	387.3	444.6	290	47.7	28.5	16	1″
12	300	315	BRA315300	BRA315300SS	450.8	520.8	345	50.9	31.7	16	11/8″
14	350	355	BRA355300	BRA355300SS	514.3	584.3	376	54	31.7	20	11/8″
16	400	400	BRA400300	BRA400300SS	571.5	647.8	430	57.2	34.9	20	11/4″
18	450	450	BRA450300	BRA450300SS	628.6	711.3	480	60.4	34.9	24	11/4″
20	500	500	BRA500300	BRA500300SS	685.8	774.8	533	63.6	34.9	24	11/4″
20	500	560	BRA560300	BRA560300SS	685.8	774.8	590	63.5	34.9	24	11/4″
24	600	630	BRA630300	BRA630300SS	812.8	914.5	660	69.85	41.2	24	11/2″
28*	700	710	BRA710300	BRA710300SS	939.8	1035.05	745	90.424	44.45	28	15/8″
32*	800	800	BRA800300	BRA800300SS	1054.1	1150	835	100.076	50.8	28	17/8″
36*	900	900	BRA900300	BRA900300SS	1168.4	1270	950	111.252	53.848	32	2″
40*	1000	1000	BRA1000300	BRA1000300SS	1155.7	1240	1030	114.3	44.45	32	15/8″
48*	1200	1200	BRA1200300	BRA1200300SS	1371.6	1465	1235	133.35	50.8	32	17/8″
52*	1400	1400	BRA1400300	BRA1400300SS	1479.6	1580	1460	144.526	53.848	32	2″

Backing Rings PN16 AS4087

Nominal Steel Pipe Size for bolt on to PE stub flange

(Inches)	(mm)	Pipe OD	Part Number (Galvanised)	Part Number (SS316)	K	D	A	T	S	No. of Bolt Holes	Bolt Size
2	50	63	BR0634087	BR0634087SS	114	150	78	11	18	4	M16
2½	65	75	BR0754087	BR0754087SS	127	165	92	11	18	4	M16
3	80	90	BR0904087	BR0904087SS	146	185	108	11	18	4	M16
4	100	110	BR1104087	BR1104087SS	178	215	128	13	18	4	M16
4	100	125	BR1254087	BR1254087SS	178	215	140	13	18	4	M16
6	150	160	BR1604087	BR1604087SS	235	280	178	13	18	8	M16
6	150	180	BR1804087	BR1804087SS	235	280	195	13	18	8	M16
8	200	200	BR2004087	BR2004087SS	292	335	235	19	18	8	M16
8	200	225*¹	BR22540878	BR22540878SS	292	335	240	19	18	8	M16
8	225	225	BR2254087	BR2254087SS	324	370	240	19	18	8	M16
10	250	250	BR2504087	BR2504087SS	356	405	290	19	22	8	M20
10	250	280	BR2804087	BR2804087SS	356	405	300	19	22	8	M20
12	300	315	BR3154087	BR3154087SS	406	455	345	23	22	12	M20
14	350	355	BR3554087	BR3554087SS	470	525	376	30	26	12	M24
15	375	375*²	BR3754087	BR3754087SS	495	550	430	30	26	12	M24
16	400	400	BR4004087	BR4004087SS	521	580	430	30	26	12	M24
18	450	450	BR4504087	BR4504087SS	584	640	480	30	26	12	M24
20	500	500	BR5004087	BR5004087SS	641	705	533	38	26	16	M24
20	500	560	BR5604087?	BR5604087SS?	641	705	587	38	26	16	M24
24	600	630	BR6304087	BR6304087SS	756	825	660	48	30	16	M27
28	700	710	BR7104087	BR7104087SS	845	910	745	56	30	20	M27
32	800	800	BR8004087	BR8004087SS	984	1060	835	56	36	20	M33
36	900	900	BR9004087	BR9004087SS	1092	1175	950	66	36	24	M33
40	1000	1000	BR10004087	BR10004087SS	1175	1255	1035	66	36	24	M33
48	1200	1200	BR12004087	BR12004087SS	1410	1490	1240	76	36	32	M33

Backing Rings PN21 AS4087

Nominal Steel Pipe Size for bolt on to PE stub flange

(Inches)	(mm)	Pipe OD	Part Number (Galvanised)	Part Number (SS316)	K	D	A	T	S	No. of Bolt Holes	Bolt Size
2	50	63	BR063408721	BR063408721SS	127	165	78	15	18	4	M16
2½	65	75	BR075408721	BR075408721SS	146	185	92	15	18	8	M16
3	80	90	BR090408721	BR090408721SS	165	205	108	15	18	8	M16
4	100	110	BR110408721	BR110408721SS	191	230	128	19	18	8	M16
6	150	160	BR160408721	BR160408721SS	260	305	178	24	22	12	M20
8	200	200	BR200408721	BR200408721SS	324	370	235	24	22	12	M20
10	250	250	BR250408721	BR250408721SS	381	430	290	30	26	12	M24
12	300	315	BR315408721	BR315408721SS	438	490	345	30	26	16	M24
15	375	355	BR355408721	BR355408721SS	495	550	376	30	30	16	M27
16	400	400	BR400408721	BR400408721SS	552	610	430	38	30	20	M27
18	450	450	BR450408721	BR450408721SS	610	675	480	38	33	20	M30
20	500	500	BR500408721	BR500408721SS	673	735	533	48	33	24	M30
20	500	560	BR560408721	BR560408721SS	673	735	590	48	33	24	M30
24	600	630	BR630408721	BR630408721SS	781	850	660	58	36	24	M33
28	700	710	BR710408721	BR710408721SS	857	935	745	58	36	24	M33
32	800	800	BR800408721	BR800408721SS	984	1060	835	68	36	28	M33
36	900	900	BR900408721	BR900408721SS	1105	1185	950	68	39	32	M36
40	1000	1000	BR1000408721	BR1000408721SS	1194	1275	1030	78	39	36	M36
48	1200	1200	BR1200408721	BR1200408721SS	1441	1530	1235	88	42	40	M39

For flanges larger than 355mm in diameter, Enviropipes can supply flanges with a single lifting eye screwed into the outside surface of the flange to facilitate vertical handling.

The lifting lugs are designed for vertical lifts only and are not to be used to lift attached pipework and/or fittings.