GOST 12821 welding neck flange dimensions PN40 4.0Mpa

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Update time : 2026-10-15 09:07:45

GOST 12821 welding neck flange dimensions PN40 4.0Mpa

　　Hebei Shengtian Pipe-Fitting Group Co., Ltd. stands as a premier manufacturer dedicated to meeting the rigorous demands of the international piping market, with a specialized focus on Russian standards. We proudly offer a comprehensive range of GOST 12821 welding neck flanges, engineered to withstand high-pressure environments up to PN40 (4.0 MPa).

Dn, мм	D, мм	D1, мм	d, мм	Dm, мм	Dn, мм	d1, мм	b, мм	h4, мм	n-￠	кg
15	95	65	14	30	19	12	14	33	4	0,79
20	105	75	14	38	26	18	14	34	4	0,97
25	115	85	14	45	33	25	14	36	4	1,18
32	135	100	18	56	39	31	16	43	4	1,83
40	145	110	18	64	46	38	16	45	4	2,19
50	160	125	18	76	58	48	17	45	4	2,81
65	180	145	18	96	77	66	19	50	8	3,71
80	195	160	18	112	90	78	21	55	8	4,80
100	230	190	22	138	110	96	23	65	8	7,40
125	270	220	26	160	135	120	25	65	8	10,00
150	300	250	26	186	161	145	27	68	8	13,03
200	375	320	30	250	222	200	35	85	12	24,44
250	445	385	33	310	278	252	39	98	12	37,59
300	510	450	33	368	330	301	42	112	16	57,10
350	570	510	33	418	382	351	48	116	16	70,34
400	655	585	39	480	432	398	54	135	16	106,76
500	755	670	45	580	535	495	58	140	20	132,33
600	890	795	52	686	636	595	58	140	20	180,95
800	1135	1030	56	908	826	795	71	190	24	343,69
1000	1360	1250	56	1140	1028	995	77	235	28	540,75
1200	1575	1460	62	1350	1228	1195	80	250	32	690,59

　　Our production facility ensures that every flange strictly adheres to GOST dimensional tolerances and material specifications, guaranteeing seamless compatibility with pipelines across the oil, gas, and petrochemical sectors. Whether you require standard carbon steel or specialized stainless steel grades, our team delivers high-quality solutions designed for durability and safety. From precise face machining to robust neck welding preparations, Shengtian provides reliable export-grade flanges that meet the exacting needs of EPC contractors and distributors worldwide. Trust our expertise for your next GOST standard procurement.

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