Threaded flange is a kind of non welded flange, which is made of inner hole of flange into pipe thread and connected with pipe with thread. Carbon steel threaded flange can be divided into: (20#, A3, Q235A, Q235B, 20G, 16Mn, ASTM A234WPB, ASTM A105, etc.)
Now the threaded flange and threaded pipe are basically made of steel, because the compression resistance of steel material is relatively strong, and the corrosion resistance is relatively good compared with other materials. Because the steel material is relatively hard, it is very convenient in the process of installation, and it is not easy to be broken. It achieves the ideal effect of the use of threaded flange. It is an ideal material for making threaded flange. The use of this kind of threaded flange not only greatly prolongs the service life of equipment and facilities, but also brings endless convenience for maintenance.
Pressure dimension specification of South African standard carbon steel threaded flange:
SANS 1123 600/4 DN6-DN150
SANS 1123 1000/4 DN6-DN150
SANS 1123 1600/4 DN6-DN150
SANS 1123 2500/4 DN6-DN150
SANS 1123 4000/4 DN6-DN150
The PN mark has 12 pressure levels,they are: PN2.5,PN6, PN10, PN16,PN25,PN40,PN63,PN100,PN160,PN250,PN320,PN400.
The class mark has six pressure levels,they are: Class 150,Class 300,Class 600,Class 900,Class 1500, Class 2500.
Standard for carbon steel threaded flange:
Chemical standard of China: HG/T20592-2009;
National standard of China: GBT9114-2010;
American Standard, British standard, German standard, Russian standard, Japanese standard, etc.
Description of flange thread pressure carbon steel
PN series: PN0.6Mpa ~ PN4.0MPa
Class series: Class150 ~ Class300;
Material description of carbon steel threaded flange:
Carbon steel flange: ASTM A105,20#, Q235, 16Mn, ASTM A350, LF1, LF2, CL1 / CL2, LF3 CL1 / CL2, ASTM A694, F42, F46, F48, F50, F52, F56, F60, F65, F70;
Standard classification
Specification: 1 / 2 "～ 80" (DN 10-DN5000)
Pressure rating: 0.25Mpa-250Mpa (150LB-2500LB)
Common standards:
National standard of China: GB9112-88 (GB9113 · 1-88 ～ GB9123 · 36-88) American Standard: ANSI B16.5, ANSI 16.47, Class150, 300, 600, 900, 1500 (TH, LJ, SW) Japanese standard: JIS 5K, 10K, 16K, 20K (PL, SO, BL)
German standard: DIN2527, 2543, 2545, 2566, 2572, 2573, 2576, 2631, 2632, 2633, 2634, 2638 （PL、SO、WN、BL、TH）
British Standard: BS4504,4506
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