Flat welded steel pipe flange

PN6 Plate flat welded steel pipe flange （mm)

Nominal size DN	Steel pipe outer diameter A1		Connection size					Flange thickness C	Flange inner diameter B1
Nominal size DN	A	B	Flange outer diameter D	Bolt hole center circle diameter K	Bolt hole diameter L	Number of bolt holes n (pcs)	Bolt Th	Flange thickness C	A	B
10	17.2	14	75	50	11	4	M10	12	18	15
15	21.3	18	80	55	11	4	M10	12	22.5	19
20	26.9	25	90	65	11	4	M10	14	27.5	26
25	33.7	32	100	75	11	4	M10	14	34.5	33
32	42.4	38	120	90	14	4	M12	16	43.5	39
40	48.3	45	130	100	14	4	M12	16	49.5	46
50	60.3	57	140	110	14	4	M12	16	61.5	59
65	76.1	76	160	130	14	4	M12	16	77.5	78
80	88.9	89	190	150	18	4	M16	18	90.5	91
100	114.3	108	210	170	18	4	M16	18	116	110
125	139.7	133	240	200	18	8	M16	20	143.5	135
150	168.3	159	265	225	18	8	M16	20	170.5	161
200	219.1	219	320	280	18	8	M16	22	221.5	222
250	273	273	375	335	18	12	M16	24	276.5	276
300	323.9	325	440	395	22	12	M20	24	328	328
350	355.6	377	490	445	22	12	M20	26	360	381
400	406.4	426	540	495	22	16	M20	28	411	430
450	457	480	595	550	22	16	M20	30	462	485
500	508	530	645	600	22	20	M20	30	513.5	535
600	610	630	755	705	26	20	M24	32	616.5	636

PN10 Plate flat welded steel pipe flange （mm)

DN	Steel pipe outer diameter A1		Connection size					Flange thickness C	Flange inner diameter B1
DN	A	B	Flange outer diameter D	Bolt hole center circle diameter K	Bolt hole diameter L	Number of bolt holes n (pcs)	Bolt Th	Flange thickness C	A	B
10	17.2	14	90	60	14	4	M12	14	18	15
15	21.3	18	95	65	14	4	M12	14	22.5	19
20	26.9	25	105	75	14	4	M12	16	27.5	26
25	33.7	32	115	85	14	4	M12	16	34.5	33
32	42.4	38	140	100	18	4	M16	18	43.5	39
40	48.3	45	150	110	18	4	M16	18	49.5	46
50	60.3	57	165	125	18	4	M16	19	61.5	59
65	76.1	76	185	145	18	8	M16	20	77.5	78
80	88.9	89	200	160	18	8	M16	20	90.5	91
100	114.3	108	220	180	18	8	M16	22	116	110
125	139.7	133	250	210	18	8	M16	22	143.5	135
150	168.3	159	285	240	22	8	M20	24	170.5	161
200	219.1	219	340	295	22	8	M20	24	221.5	222
250	273	273	396	350	22	12	M20	26	276.5	276
300	323.9	325	445	400	22	12	M20	26	328	328
350	355.6	377	505	460	22	16	M20	28	360	381
400	406.4	426	565	515	26	16	M24	32	411	430
450	457	480	615	565	26	20	M24	36	462	485
500	508	530	70	620	26	20	M24	38	513.5	535
600	610	630	780	725	30	20	M27	42	616.5	636

PN16 Plate flat welded steel pipe flange （mm)