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2.Standard:ASME,ANSI,BS,DIN,JIS 
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1. ANSI flange

Standard : ANSI B16.5 , ANSI B16.47 , ANSI B16.36 , MSS SP44 , ANSI B 16.48
Types : Welding Neck flanges , Slip On flanges , Threaded flanges , Socket Welding flanges , Blind flanges , Orifice flanges , Lap Joint flanges , Ring Joint flanges , Long Welding Neck flanges , Figure 8 Blanks
Pressure Grade : Class 150 , Class 300 , Class 600 , Class 900 , Class 1500 , Class 2500
Size : 1/2" NB to 48" NB

2. DIN flange

Standard : DIN 2527 , DIN 2566 , DIN 2573 , DIN 2576 , DIN 2641 , DIN 2642 , DIN 2655 , DIN 2656 , DIN 2627 , DIN 2628 , DIN 2629 , DIN 2631 , DIN 2632 , DIN 2633 , DIN 2634 , DIN 2635 , DIN 2636 , DIN 2637 , DIN 2638 , DIN 2673
Types : Welding Neck flanges , Slip On flanges , Threaded flanges , Socket Welding flanges , Blind flanges
Pressure Grade : 6 Bar , 10 Bar , 16 Bar , 25 Bar , 40 Bar
Size : DN10 - DN 1000

3. JIS flange
Standard : B2220
Types : Sop type , Soh type , Plate flanges , Blind flanges
Pressure Grade : Class 5K , Class 10K , Class 16K , Class 20K , Class 30K
Size : 10A - 1500A

4. BS flange

1) Standard : BS 4504 SEC 3.1
Types : Welding Neck flanges (111/134) , Hubbed Slip On flanges (112) , Hubbed Threaded flanges (113) , Lapped Pipe-end flanges E (133) , Plate Flanges (101) , Loose Plate flanges (102) , Loose Plate with Weld- Neck flanges (104) , Blank flanges (105)
Pressure Grade : PN2.5 - PN 40

2)Standard : BS 4504 (PART -1)
Pressure Grade : PN 2.5 - PN 40

3)Standard : BS 10
Types : Table D , E , F , H Welding Neck flanges , Plate Slip-On flanges , Screwed Boss flanges , Slip On Boss flanges , Blind flanges
Size : 1/2" NB - 48" NB

5. EN 1092-1:2001 flange

Type : Type 1 (Plate flanges) , Type 2 ( Loose Plate flanges) , Type 5 ( Blank flanges) , Type 11 ( Weld-Neck flanges) , Type 12 ( Hubbed Slip-On flanges for welding) , Type 13 ( Hubbed Threaded flanges )
Pressure Grade : PN2.5 , PN6 , PN10 , PN16 , PN 25 , PN40 , PN63 , PN100
Size : 1/2" - 48"

6. Gost flange

Type : Plate flanges( GOST 12820-80) , Blind flanges ( GOST 12836-67) , Welding Neck flanges ( GOST 12821-80) , Steel Butt-Welded flanges (GOST 12821-80)
Pressure Grade : PN0.6 - PN 10.0 (100/2)
Size : 1/2" - 48"