Forged Carbon Steel Flanges JIS 20K – Heavy Duty Construction

• Customization: Available
• Standard: JIS
• Type: Weld Neck Flanges
• Model NO.: flange
• Material: Carbon Steel
• Structure: Round
• Connection: Welding
• Sealing Surface: RF
• Manufacturing Way: Forging
• Size: 15A ~1500A
• Pressure Rating: 5K,10K,16K,20K,30K
• Transport Package: Wooden Case, Customized Packing
• Specification: 15A ~1500A
• Trademark: Yulong
• Origin: Cangzhou, China
• HS Code: 7307910000
• Production Capacity: 7000tons/Year

Product Description

 

Nominal Pipe Size	Depth of Socket	DRILLING			BOLTING				APPROXIMATE WEIGHT
		Bolt Circle Diam	Number of Holes	Diam of Holes	Diam of Bolts (inch)	Machine Bolt Length	Study Bolt Length		Welding Neck			Slip-on and Threaded	Lap Joint	Blind	Socket Welding
						Raised Face	Raised Face	Ring Joint	SCH40	SCH80	SCH160
1/2	9.7	60.8	4	15.7	1/2	50.8	57.2	-	0.60	0.60	0.60	0.47	0.51	0.47	0.47
3/4	11.2	69.9	4	15.7	1/2	50.8	63.5	-	0.90	0.90	0.90	0.58	0.64	0.63	0.59
1	12.7	79.2	4	15.7	1/2	57.2	63.5	76.2	1.14	1.18	1.24	0.86	0.93	0.94	0.87
1 1/4	14.2	88.9	4	15.7	1/2	57.2	69.9	82.6	1.41	1.48	1.54	1.08	1.16	1.23	1.11
1 1/2	15.7	98.6	4	15.7	1/2	63.5	69.9	82.6	1.81	1.90	2.01	1.41	1.51	1.62	1.45
2	17.5	120.7	4	19.1	5/8	69.9	82.6	95.3	2.72	2.84	3.07	2.26	2.38	2.64	2.33
2 1/2	19.1	139.7	4	19.1	5/8	76.2	88.9	101.6	4.45	4.70	4.98	3.43	3.6	4.07	3.55
3	20.6	152.4	4	19.1	5/8	76.2	88.9	101.6	5.22	5.54	5.90	3.87	4.04	4.92	4.02
3 1/2	22.4	177.8	8	19.1	5/8	76.2	88.9	101.6	6.40	6.76	7.46	5.20	5.24	5.90	5.24
4	23.9	190.5	8	19.1	5/8	76.2	88.9	101.6	7.49	7.96	8.90	5.75	5.96	7.41	5.99
5	23.9	215.9	8	22.4	3/4	82.6	95.3	108.0	9.53	10.54	12.04	6.26	6.44	8.76	6.68
6	26.9	241.3	8	22.4	3/4	82.6	101.6	114.3	11.80	13.12	15.11	7.38	7.65	11.40	8.60
8	31.8	298.5	8	22.4	3/4	88.9	108.0	120.7	19.10	21.34	25.84	12.36	12.66	20.10	13.60
10	33.3	362.0	12	25.4	7/8	101.6	114.3	127.0	24.50	28.85	35.74	17.10	17.4	29.39	19.50
12	39.6	431.8	12	25.4	7/8	101.6	120.7	133.4	39.90	46.80	58.01	27.68	28.3	43.80	29.10
14	41.4	476.3	12	28.4	1	114.3	133.4	146.1	51.80	62.58	77.60	35.2	41.5	59.42	40.90
16	44.5	539.8	16	28.4	1	114.3	133.4	146.1	64.50	79.42	98.82	45.5	52.98	77.40	47.17
18	49.3	577.9	16	31.8	1 1/8	127.0	146.1	158.8	74.90	97.63	124.32	49.71	59	94.8	54.43
20	54.1	635.0	20	31.8	1 1/8	139.7	158.8	171.5	89.40	120.44	154.18	66.5	72.12	123.4	70.31
24	63.5	749.3	20	35.1	1 1/4	152.4	171.5	184.2	121.70	169.37	223.92	90.5	99.42	188.24	95.25

 

 

Certificate

Our factory



Our DIN Flanges are fabricated with precision, strictly adhering to DIN standards, ensuring seamless compatibility within European and international industrial systems.



Take our Weld Neck Flanges (WN) as an example. They feature a long neck that gradually transitions to the pipe wall thickness, enhancing strength and stress distribution. This design makes them highly suitable for high - pressure, high - temperature, and severe - service applications, such as in the petrochemical and power generation industries. Our Slip - On Flanges (SO), on the other hand, are easy to install, with a flat face that slips over the pipe end and is then welded. They are cost - effective and widely used in low - to - medium - pressure systems, like those in the water supply and general industrial piping.

Welding connections, including butt - welding and socket - welding, offer strong and leak - tight joints. Butt - welding is preferred for high - pressure pipelines, ensuring a continuous and robust connection. Socket - welding, suitable for small - diameter pipes, simplifies installation while maintaining good strength. Bolted connections, using high - quality bolts and nuts, provide flexibility for easy assembly and disassembly, which is convenient for maintenance and system modifications.

Our state - of - the - art manufacturing facility is equipped with advanced machinery and testing equipment. For example, our non - destructive testing methods, such as ultrasonic testing and magnetic particle inspection, ensure that each flange meets the highest quality standards, free from internal defects and surface flaws.

Whether it's a special size, a unique connection method, or a customized surface treatment, our experienced team is committed to providing you with tailored solutions. Please don't hesitate to contact us for all your DIN flange needs.