Threaded Flanges are used for special circumstances with their main advantage being that they can be attached to the pipe without welding. Sometimes a seal weld is also used in conjunction with the threaded connection.
Although still available in most sizes and pressure ratings, screwed fittings today are used almost exclusively in smaller pipe sizes.
A threaded flange or fitting is not suitable for a pipe system with thin wall thickness, because cutting thread on a pipe is not possible. Thus, thicker wall thickness must be chosen...what is thicker ?
1.ASME
ANSI B16.5,ASME B16.5,ASME B16.47,ASME B16.36,ASME B16.48,AWWA C-207,API 605,API590,MSS SP44,API6A
2.DIN
DIN2527,DIN2566,DIN2573,DIN2576,DIN2627,DIN2628,DIN2629,DIN2630,DIN2631,DIN2632,
DIN2633,DIN2634,DIN2635,DIN2636,DIN2637,DIN2638,DIN2641,DIN642,DIN2655,DIN2656,
DIN2673,DIN28030,DIN28031,DIN28032,DIN28036,DIN28038,DIN86029,DIN86030,DIN11864-2
3.EN
EN1092-1,EN1759-1
4.BS
B.S 3293,B.S 4504,B.S 10
5.ISO
ISO 7005-1
6.AS
AS2129,AS4087, AS, NZS 4331.1
7.JIS
JIS B2220,JIS B2238,JIS B2290,JIS G3443-2,JPI-7S-15,JPI-7S-43
8.UNI
UNI2253,UNI2254,UNI2276,UNI2277,UNI2278,UNI2280,UNI,2281~2286,UNI6091~6094
Size
1/8”~160”,DN10~DN4000
Pressure
PN1,PN2.5,PN6,PN10,PN16,PN25,PN40,PN64,PN100,PN160,PN250,PN320,PN400
CLASS75,CLASS150,CLASS300,CLASS400,CLASS600,CLASS900,CLASS1500,CLASS2500
2K,5K,10K,16K,20K,30K,40K
Specification
Plate Flange,Slip-On Welding Flange,Welding Neck Flange,Threaded Flange,Socket Welding Flange,Blind Flange,Long Welding Neck Flange,Lap Joint,Loose Plate Flange,Orifice Flange,Reducing Flange,Integral flange,Figure-8,Paddle Blank,Paddle Spacer,Specatcle Blind,Squre Flange,Reducing Flange, Orifice Flange
Material
1.Carbon Steel
A105,A350 LF1,A350 LF2,A350 LF3
2.Stainless Steel
ASTM SA-182/SA-182M F304,F304H,F304L,F316,F316H,F316L,F321,321H,F316Ti,317,F317H,F347,F904L,F310
3.Duplex Stainless Steel
F51,F53,F60
4. Hastelloy
Hastelloy B,Hastelloy B-2,Hastelloy B-3,Hastelloy C-4,Hastelloy C-22,,Hastelloy C-276,Hastelloy C-2000,Hastelloy G-35,Hastelloy G-30,Hastelloy N,Hastelloy S,Hastelloy X
5. Haynes
Haynes 188,Haynes 230,Haynes 556
6. Incoloy
Incoloy 020,Incoloy 800,Incoloy 800H,Incoloy 800HT,Incoloy 825,Incoloy 925,Incoloy A-286,
7. Inconel
Inconel 600,Inconel 601,Inconel 617,Inconel 625,Inconel 718,Inconel X750
8. Monel
Monel 400,Monel 401,Monel 404,Monel K-500
9. Nickel
Nickel 200,Nickel 201
