In the behavior, we make beveling after shot blasting, bevel ends are fully machined by advanced equipment Double Beveling Machine ensure the height, length, thickness, O.D. and I.D. are all qualified.

Welding Bevel acc. to

ASME B16.9, Factory-Made Wrought Steel Buttwelding Fittings
ASME B16.28, Buttwelding Short Radius Elbows and Returns
ANSI/ASME B16.25, Buttwelding Ends
MSS SP-97, Socket Welding, Threaded, and Buttwelding Ends

The ends of all buttweld fittings are bevelled, exceeding wall thickness 4 mm for austenitic stainless steel, or 5 mm for ferritic stainless steel. The shape of the bevel depending upon the actual wall thickness. This bevelled ends are needed to be able to make a “Butt weld”.

ASME B16.25 covers the preparation of buttwelding ends of piping components to be joined into a piping system by welding. It includes requirements for welding bevels, for external and internal shaping of heavy-wall components, and for preparation of internal ends (including dimensions and dimensional tolerances).

Our in-hourse R&D team developed bevel ends equipment are good using in thickness 2mm to 20mm pipe fittings, guarantee high efficiency and high quality.

These weld edge preparation requirements are also incorporated into the ASME standards (e.g., B16.9, B16.5, B16.34).

Nominal wall Thickness : t	End Preparation
t<5mm (for austenitic alloy steel	Cut square or slightly chamfer
t<4mm)	at manufacturer ' s option
5 (4	Plain Bevel as in sketch ( a ) above
t>22mm	Compound Bevel as in sketch ( b ) above

Nominal pipe	Outside Diameter at Bevel				Center to End
DN size	D1		D2		C	M
DN size	Series A	Series B	Series A	Series B	C	M
20×15	26.9	25	21.3	18	29	29
25×20	33.7	32	26.9	25	38	38
25×15	33.7	32	21.3	18	38	38
32×25	42.4	38	33.7	32	48	48
32×20	42.4	38	26.9	25	48	48
32×15	42.4	38	21.3	18	48	48
40×32	48.3	45	42.4	38	57	57
40×25	48.3	45	33.7	32	57	57
40×20	48.3	45	26.7	25	57	57
40×15	48.3	45	21.3	18	57	57
50×40	60.3	57	48.3	45	64	60
50×32	60.3	57	42.4	38	64	57
50×25	60.3	57	33.7	32	64	51
50×20	60.3	57	26.9	25	64	44
65×50	76.1(73)	76	60.3	57	76	70
65×40	76.1(73)	76	48.3	45	76	67
65×32	76.1(73)	76	42.4	38	76	64
65×25	76.1(73)	76	33.7	32	76	57
80×65	88.9	89	76.1(73)	76	86	83
80×50	88.9	89	60.3	57	86	76
80×40	88.9	89	48.3	45	86	73
80×32	88.9	89	42.4	38	86	70
90×80	101.6	-	88.9	-	95	92
90×65	101.6	-	76.1(73)	-	95	89
90×50	101.6	-	60.3	-	95	83
90×40	101.6	-	48.3	-	95	79
100×90	114.3	-	101.6	-	105	102
100×80	114.3	108	88.9	89	105	98
100×65	114.3	108	76.1(73)	76	105	95
100×50	114.3	108	60.3	57	105	89
100×40	114.3	108	48.3	45	105	86
125×100	139.7	133	114.3	108	124	117
125×90	139.7	-	101.6	-	124	114
125×80	139.7	133	88.9	89	124	111
125×65	139.7	133	76.1(73)	76	124	108
125×50		133	60.3	57	124	105
150×125	168.3	159	139.7	133	143	137
150×100	168.3	159	114.3	108	143	130
150×90	168.3	-	101.6	-	143	127
150×80	168.3	159	88.9	89	143	124
150×65	168.3	159	76.1(73)	76	143	121
200×150	219.1	219	168.3	159	178	168
200×125	219.1	219	139.7	133	178	162
200×100	219.1	219	114.3	108	178	156
200×90	219.1	-	101.6	-	178	152
200×200	273	273	219.1	219	216	208
200×150	273	273	168.3	159	216	194
200×125	273	273	139.7	133	216	191
200×100	273	273	114.3	108	216	184
300×250	323.9	325	273	273	254	241
300×200	323.9	325	219.1	219	254	229
300×150	323.9	325	168.3	159	254	219
300×125	323.9	325	139.7	133	254	216
350×300	355.6	377	323.9	325	279	270
350×250	355.6	377	273	273	279	257
350×200	355.6	377	219.1	219	279	248
350×150	355.6	377	168.3	159	279	238
400×350	406.4	426	355.6	377	305	305
400×300	406.4	426	323.9	325	305	295
400×250	406.4	426	273	273	305	283
400×200	406.4	426	219.1	219	305	273
400×150	406.4	426	168.3	159	305	264
450×400	457.2	478	406.4	426	343	330
450×350	457.2	478	355.6	377	343	330
450×300	457.2	478	323.9	325	343	321
450×250	457.2	478	273	273	343	308
450×200	457.2	478	219.1	219	343	298
500×450	508	529	457.2	478	381	368
500×100	508	529	406.4	426	381	356
500×350	508	529	355.6	377	381	356
500×300	508	529	323.9	325	381	346
500×250	508	529	273	273	381	333
500×200	508	529	219.1	219	381	324
550×500	559	-	508	-	419	406
550×450	559	-	457	-	419	394
550×400	559	-	406	-	419	381
600×550	610	-	559	-	432	432
600×550	610	630	508	530	432	432
600×450	610	630	457	480	432	419
650×600	660	-	610	-	495	483
650×550	660	-	559	-	495	470
650×500	660	-	508	-	495	457
700×650	711	-	660	-	521	521
700×600	711	720	610	630	521	508
700×550	711	-	559	-	521	495
750×700	762	-	711	-	559	546
750×650	762	-	660	-	559	546
750×600	762	-	610	-	559	533
800×750	813	-	762	-	597	584
800×700	813	820	711	720	597	572
800×650	813	-	660	-	597	572
850×800	864	-	813	-	635	622
850×750	864	-	762	-	635	610
850×700	864	-	711	-	635	597
900×850	914	-	864	-	673	660
900×800	914	920	813	820	673	648
900×750	914	-	762	-	673	635
950×900	965	-	914	-	711	711
950×850	965	-	864	-	711	698
950×800	965	-	813	-	711	686
1000×950	1016	-	965	-	749	749
1000×900	1016	1020	914	920	749	737
1000×8500	1016	-	864	-	749	724
1000×1000	1067	-	1016	-	762	711
1050×950	1067	-	965	-	762	711
1050×900	1067	-	914	-	762	711
1100×1050	1118	-	1067	-	813	762
1100×1000	1118	1120	1016	1020	813	749
1100×950	1118	-	965	-	813	737
1150×1100	1168	-	1118	-	851	800
1150×1050	1168	-	1067	-	851	787
1150×1000	1168	-	1016	-	851	775
1200×1150	1220	-	1168	-	889	838
1200×1100	1220	1220	1118	1120	889	838
1200×1050	1220	-	1067	-	889	813

Nominal pipe size		Outside Diameter at Bevel		Center to End
		D		C	M
DN	INCH	Series A	Series B	C	M
15	1/2	21.3	18	25
20	3/4	26.9	25	29
25	1	33.7	32	38
32	1 1/4	42.4	38	48
40	1 1/2	48.3	45	57
50	2	60.3	57	64
65	2 1/2	76.1(73)	76	76
80	3	88.9	89	86
90	3 1/2	101.6	―	95
100	4	114.3	108	105
125	5	139.7	133	124
150	6	168.3	159	143
200	8	219.1	219	178
250	10	273	273	216
300	12	323.9	325	254
350	14	355.6	377	279
400	16	406.4	426	305
450	18	457.2	478	343
500	20	508	529	381
550	22	559	―	419
600	24	610	630	432
650	26	660	―	495
700	28	711	720	521
750	30	762	―	559
800	32	813	820	597
850	34	864	―	635
900	36	914	920	673
950	38	965	―	711
1000	40	1016	1020	749
1050	42	1067	―	762	711
1100	44	1118	1120	813	762
1150	46	1168	―	851	800
1200	48	1220	1220	889	838

These weld edge preparation requirements are also incorporated into the ASME standards (e.g., B16.9, B16.5, B16.34).

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