• A simple introduction for stainless steel flanges

Stainless Steel Flange

Flange is a kind of disc-shaped part, which is the most common in the pipe work. Flanges are in pairs and can match with the flanges on the valves. The flange is mainly used for pipe connection in the pipe work. We need to install a flange on each pipe that needs to be connected; we can use flanges with screwed connection in low pressure pipelines; as for pipelines with pressure greater than 4 kg, we can choose welded flanges. We need to add a gasket between the two flanges and fasten it with bolts. Flanges with different pressures have different thickness and use different bolts.

Main functions of flanges
1. Connecting pipelines and keeping seal performance of the pipe.
2. Replacing the pipeline.
3. Making it easy to open and check the situation of the pipeline.
4. Being good for the closure of a certain section of pipelines.

Standard classification
Specifications: 1/2 "~ 80" (DN10-DN5000).
Pressure rating: 0.25Mpa ~ 250Mpa (150Lb ~ 2500Lb).
Commonly used standards:
Chinese Standards: GB9112-88 (GB9113 · 1-88 ~ GB9123 · 36-88).
American Standards: ANSI B16.5, ANSI 16.47 Class150,300,600,900,1500 (TH, LJ, SW).
Japanese standards: JIS 5K, 10K, 16K, 20K (PL, SO, BL).
German standards: DIN2527,2543,2545,2566,2572,2573,2576,2631,2632,2633,2634,2638
(PL, SO, WN, BL, TH).
Italian standards: UNI2276,2277,2278,6083,6084,6088,6089,2299,2280,2281,2282,2283
(PL, SO, WN, BL, TH).
British Standards: BS4504 and 4506.
Ministry of Chemical Industry Standards: HG5010-52 ~ HG5028-58, HGJ44-91 ~ HGJ65-91
HG20592-97 (HG20593-97 ~ HG20614-97), HG20615-97 (HG20616-97 ~ HG20635-97).
Machinery Department Standards: JB81-59 ~ JB86-59, JB / T79-94 ~ JB / T86-94.
Pressure vessel standards: JB1157-82 ~ JB1160-82, NB / T47020-2012 ~ NB / T47027-2012.
Marine flange standards: GB / T11694-94, GB / T3766-1996, GB / T11693-94, GB10746-89, GB / T4450-1995, GB / T11693-94, GB573-65, GB2506-89, CBM1012-81, CBM1013 and so on.

Flange production standards
Chinese Standards: GB / T9112-2010 (GB9113 · 1-2010 ~ GB9123 · 4-2010)
Ministry of Chemical Industry Standards: HG5010-52 ~ HG5028-58, HGJ44-91 ~ HGJ65-91, HG20592-2009 series, HG20615-2009 series.
Machinery Department Standards: JB81-59 ~ JB86-59, JB / T79-94 ~ JB / T86-94, JB / T74-1994.
Pressure vessel standards: JB1157-82 ~ JB1160-82, JB4700-2000 ~ JB4707-2000 B16.47A / B B16.39 B16.48.

 

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