A 14 Inch Weld Neck Flange is engineered for large-diameter, high-pressure piping systems where strength, reliability, and long-term performance are critical. Designed with a long tapered hub, this flange provides smooth stress transition from flange to pipe, reducing the risk of cracking and ensuring structural integrity under extreme operating conditions. Manufactured in compliance with ASME B16.5, it offers precision machining, dimensional accuracy, and secure butt-weld connections.

The weld neck design minimizes turbulence and erosion inside the pipeline, making it suitable for demanding industries such as oil & gas, petrochemical, offshore, refinery, power plants, and heavy industrial applications. Available in multiple material grades and pressure ratings, the 14 Inch Weld Neck Flange delivers excellent corrosion resistance and mechanical strength in harsh environments.

Our Steel Grades

Austenitic

Grade	USA	Japan	Germany	UK		France	Sweden	China
	ANSI/ASME	JIS	DIN	BS	EN	AFNOR	SS	GB
304	AISI 304	SUS 304	1.4301	304S31	X5CrNi18-10	Z6CN18-09	2337	0Cr18Ni9
304L	AISI 304L	SUS 304L	1.4306	304S11	X2CrNi19-11	-	1.4306	00Cr19Ni10
304H	AISI 304H	SUS 304H	1.4301H	1.4301H	304S41	X5CrNi18-10	-	0Cr18Ni9H
316	AISI 316	SUS 316	1.4401	316S31	X5CrNiMo17-12-2	Z6CNMo17-12-2	1.4401	0Cr17Ni12Mo2
316L	AISI 316L	SUS 316L	1.4404	316S11	X2CrNiMo17-12-2	-	1.4404	00Cr17Ni12Mo2
303	AISI 303	SUS 303	1.4305	303S31	X8CrNiS18-9	-	1.4305	0Cr17Ni12
309	AISI 309	SUS 309	1.4828	309S31	X15CrNi25-20	-	1.4828	-
309S	AISI 309S	SUS 309S	1.4833	309S31	X15CrNi25-20	-	1.4833	-
309H	AISI 309H	SUS 309H	1.4833	309H31	X15CrNi25-20	-	1.4833	-
310	AISI 310	SUS 310	1.4841	310S31	X15CrNi25-20	-	1.4841	-
310S	AISI 310S	SUS 310S	1.4841	310S31	X15CrNi25-20	-	1.4841	-
310H	AISI 310H	SUS 310H	1.4845	310H31	X15CrNi25-20	-	1.4845	-
317	AISI 317	SUS 317	1.4449	317S31	X6CrNiMoTi17-12-2	-	1.4449	-
317L	AISI 317L	SUS 317L	1.4438	317S11	X2CrNiMo17-12-2	-	1.4438	-
317LMN	AISI 317LMN	-	1.4438	-	X2CrNiMoN17-12-2	-	1.4438	-
321	AISI 321	SUS 321	1.4541	321S31	X6CrNiTi18-10	Z6CnTi18-10	1.4541	1Cr18Ni11Ti
321H	AISI 321H	SUS 321H	1.4541H	321H31	X6CrNiTi18-10	-	1.4541H	1Cr18Ni11TiH
347	AISI 347	SUS 347	1.455	347S31	X6CrNiNb18-10	Z6CnNb18-10	1.455	1Cr18Ni11Nb
347H	AISI 347H	SUS 347H	1.4550H	347H31	X6CrNiNb18-10	-	1.4550H	1Cr18Ni11NbH

Ferritic, Martensitic, Duplex, Precipitation Hardening

Grade	USA	Japan	Germany	UK		France	Sweden	China
	ANSI/ASME	JIS	DIN	BS	EN	AFNOR	SS	GB
430	AISI 430	SUS 430	1.4016	430S17	X12Cr17	Z10CD17	1.4016	1Cr17
434	AISI 434	SUS 434	1.4112	434S17	X15CrNiSi20-12	–	1.4112	1Cr18Si19
436	AISI 436	SUS 436	1.4112	436S21	X3Cr12	–	1.4112	1Cr12
444	AISI 444	SUS 444	1.4521	444S23	X2CrTi12	–	1.4521	0Cr18Ti12
409	AISI 409	SUS 409	1.4512	409S17	X8Cr17	Z10CD17	1.4512	1Cr17
409L	AISI 409L	SUS 409L	1.4512L	409L	X8Cr17	–	1.4512L	1Cr17L
410	AISI 410	SUS 410	1.4006	410S21	X20Cr13	Z20CD13	1.4006	1Cr13
420	AISI 420	SUS 420	1.4021	420S29	X20Cr13	Z20CD13	1.4021	1Cr13
431	AISI 431	SUS 431	1.4057	431S29	X12CrMoV12-3	–	1.4057	1Cr13MoV
440A	AISI 440A	SUS 440A	1.4115	440S38	X50CrMoV15	–	1.4115	1Cr15MoV
440B	AISI 440B	SUS 440B	1.4418	440S40	X55CrMoV14	–	1.4418	1Cr17MoV
440C	AISI 440C	SUS 440C	1.4125	440S45	X65Cr13	–	1.4125	1Cr18Mo
2205	AISI 2205	SUS 2205	1.4462	2205S32	X2CrNiMoN22-5-3	Z3CN22-5-3	1.4462	–
2507	AISI 2507	SUS 2507	1.441	2507S32	X2CrNiMoCu25-7-4	Z6CN25-7-4	1.441	–
2304	AISI 2304	SUS 2304	1.4362	2304S31	X2CrNiMoN21-5-2	–	1.4362	–
904L	AISI 904L	SUS 904L	1.4539	904S13	X1NiCrMoCu25-20-5	Z6CND25-20-5	1.4539	–
LDX 2101	–	–	1.4162	LDX	X2CrNiN22-5-2	–	1.4162	–
S32205	–	–	1.4462	S32205	X2CrNiMoN22-5-3	–	1.4462	–
17-4 PH	AISI 17-4 PH	SUS 17-4 PH	1.4542	17-4 PH	X5CrNiCuNb16-4	Z5CNCuNb16-4	1.4542	–
15-5 PH	AISI 15-5 PH	SUS 15-5 PH	1.4545	15-5 PH	X5CrNiCuNb15-4	Z5CNCuNb15-4	1.4545	–
13-8 Mo	AISI 13-8 Mo	SUS 13-8 Mo	1.4548	13-8 Mo	X4CrNiMo16-5-1	Z4CNiMo16-5-1	1.4548	–
17-7 PH	AISI 17-7 PH	SUS 17-7 PH	1.4568	17-7 PH	X7CrNiAl17-7	Z7CNiAl17-7	1.4568	–
2507	AISI 2507	SUS 2507	1.441	2507S32	X2CrNiMoCu25-7-4	Z6CN25-7-4	1.441	–

Carbon Steel

USA (AISI/SAE)	Japan (JIS)	Germany (W-nr)	DIN	BS (UK)	Europe (EN)	France (AFNOR)	Italy (UNI)	Sweden (SS)	China (GB)
A36	SS400	1.0117	St37-2	40EE	S235J2	A37-2	Fe360B	17100	Q235B
1015	SM400A	1.0038	RSt37-2	40A	S235JR	E24-2	Fe360B	1311	Q235A
1035	S35C	1.0501	C35	070M36	C35	AF55C35	C35	1550	35
12L14	SUM24L	1.0736	9SMnPb28	230M07Pb	11SMnPb30	-	AVZ	1914	Y12Pb
A105 LF2	SF440A	1.046	C22.8	161-360A	P250GH	C22.8	C21	-	20MnK
55	S55C	1.0535	C55	070M55	C55	XC55	C55	1655	55
1042/1045	S45C	1.0503	C45	070M46	Ck42	AF65C45	C45	1650	40
1040/1038	S40C	1.0511	C40	080M40	C40	AF60C40	C40	1671	40
1050	S50C	1.054	C50	080A52	C50	XC48H1	C50	1674	50
4130	SCM430	1.7218	25CrMo4	708A25	25CrMo4	25CD4	25CrMo4	2244	30CrMo
A283 Gr.CSS330	1.0038	1.0038	St37-2	43C	S185	A33-3	Fe320	17100	Q235C
A572 Gr.50SM490A	1.0545	1.0545	S355J2G3	50D	S355JR	Fe510D	1872	Q345B	Q345B
4140	SCM440	1.7225	42CrMoS4	708M40	42CrMoS4	42CD4u	42CrMo4	2244	42CrMo
4340	SNCM439	1.6582	34CrNiMo6V	817M40	34CrNiMo6	35NCD6	35NiCrMo6KB	2541	ZG34CrNiMo
5160	SUP9	1.1777	51CrV4	251A58	51CrV4	51CDV4	50CrV4	2551	60CrMnV
8620	SNCM220	1.6523	20CrNiMo2	805M20	20NiCrMo2	20NCD2	20CrNiMo	2258	20CrNiMo
300M	-	1.6957	43CrNiMo8-6-4	-	40NiCrMo8-4-4	40CNCD8-6	-	-	40CrNiMo

USA (AISI/SAE)	Japan (JIS)	Germany (W-nr)	DIN	BS (UK)	Europe (EN)	France (AFNOR)	Italy (UNI)	Sweden (SS)	China (GB)
A36	SS400	1.0117	St37-2	40EE	S235J2	A37-2	Fe360B	17100	Q235B
1015	SM400A	1.0038	RSt37-2	40A	S235JR	E24-2	Fe360B	1311	Q235A
1035	S35C	1.0501	C35	070M36	C35	AF55C35	C35	1550	35
12L14	SUM24L	1.0736	9SMnPb28	230M07Pb	11SMnPb30	-	AVZ	1914	Y12Pb
A105 LF2	SF440A	1.046	C22.8	161-360A	P250GH	C22.8	C21	-	20MnK
55	S55C	1.0535	C55	070M55	C55	XC55	C55	1655	55
1042/1045	S45C	1.0503	C45	070M46	Ck42	AF65C45	C45	1650	40
1040/1038	S40C	1.0511	C40	080M40	C40	AF60C40	C40	1671	40
1050	S50C	1.054	C50	080A52	C50	XC48H1	C50	1674	50
4130	SCM430	1.7218	25CrMo4	708A25	25CrMo4	25CD4	25CrMo4	2244	30CrMo
A283 Gr.CSS330	1.0038	1.0038	St37-2	43C	S185	A33-3	Fe320	17100	Q235C
A572 Gr.50SM490A	1.0545	1.0545	S355J2G3	50D	S355JR	Fe510D	1872	Q345B	Q345B
4140	SCM440	1.7225	42CrMoS4	708M40	42CrMoS4	42CD4u	42CrMo4	2244	42CrMo
4340	SNCM439	1.6582	34CrNiMo6V	817M40	34CrNiMo6	35NCD6	35NiCrMo6KB	2541	ZG34CrNiMo
5160	SUP9	1.1777	51CrV4	251A58	51CrV4	51CDV4	50CrV4	2551	60CrMnV
8620	SNCM220	1.6523	20CrNiMo2	805M20	20NiCrMo2	20NCD2	20CrNiMo	2258	20CrNiMo
300M	-	1.6957	43CrNiMo8-6-4	-	40NiCrMo8-4-4	40CNCD8-6	-	-	40CrNiMo
4130	SCM420	1.7218	25CrMo4	708A25	25CrMo4	-	25CrMo4	2142	30CrMo
4140/4142	SCM440H	1.7225	42CrMo4	708M40	42CrMo4	42CD4	42CrMo4	2244	42CrMo
4340	SNCM447	1.6582	34CrNiMo6	817M40	34CrNiMo6	35NCD6	35CrNiMo6	2541	34CrNi3Mo
8620	SNCM220	1.6523/-	20NiCrMo2-2	805A20	20NiCrMo2-2	20NCD2	20NiCrMo2	2520	20CrNiMo
52100	SUJ2	1.2067	100Cr6	534A99	102Cr6	100Cr6	100Cr6	2258	GCr15
5140	SCR440	1.7035	41Cr4	530M40	41Cr4	41CD4	41Cr4	2241	40Cr
6150	SCRV50	1.8159	50CrV4	735A50	51CrV4	50CV4	50CrV4	2230	50CrVA
8627	SNCM220	-	-	-	-	-	-	-	-
1527	SCMn2	1.0401	28Mn6	120M36	28Mn6	35Mn5	C28Mn	1370	30Mn2
5120	SCM220	1.7027	20Cr4	530M20	20Cr4	20CD4	20Cr4	2252	20CrMn
8622	SNCM220	-	-	-	-	-	-	-	-
4320	SNCM420	1.6523	20NiCrMo2-2	805M20	20NiCrMo2-2	20NCD2	20NiCrMo2	-	20CrNiMo
5015	SCR415	1.7015	15Cr3	530M15	15Cr3	-	-	2115	15CrMn
5130	SCR430	1.7176	30Cr4	530M30	30Cr4	-	-	-	30CrMnSi