Screwed Flange is rather simple flange with internal screwed/threaded bore for connecting with external screwed pipes.  All other properties similar to standard pipeline flanges.

Why Screwed Flanges?
Screwed Flanges has internal screwed or threaded boring for connecting with screwed pipelines. Screwed Flanges can be used where there is frequent mounting & dismounting of joint. Usually recommended for smaller sized screwed pipelines with high pressure flow.

Manufacturing Screwed Flange
Screwed Flanges are manufactured as forged & machined to size with F-NPT, BSPT, ISO or ACME threads. Screwed Flanges are forged from suitable forging stock, bar stock or heavy plates. Low pressure screwed flanges can also be directly machining plates.

Material for Screwed Flanges
Screwed Flanges can be manufactured in almost all known ferrous & non-ferrous Metals & Alloys.
Carbon Steel
A105 / A105N / A181 / A350 LF2 / LF3 / LF6 / A694 F52 / F60 / F65 / F70
Chrome Moly Steel
A182 F5  /  F9  /  F11  /  F12 /  F22  /  F91  /  F92
Stainless Steel
304 / 304L / 304H / 309 / 309S / 310 / 310S / 316 / 316L / 316H / 316Ti / 317 / 317L / 321 / 321H / 347 / 347H / 348 / 348H
Duplex Steel
S31803 / F51 /  S32205 / F60 / 1.4462
Super Duplex
S32750 / F53 / 1.4410 /  S32760 / F55  / 1.4501
Nickel
N02200  /  N02201
Inconel
600 ( N06600 ) / 601 ( N06601 ) / 625( N06625 ) / 718( N07718 ) / 800 ( N08800 ) / 800H ( N08810 ) / 800HT ( N08811 )
Monel
Monel 400 (UNS N04400) / Monel 400 (Din N2.4360) / Monel K500 (UNS N0550) / Monel K500(Din 2.4375)
Hastelloy
B2 ( N010665 ) / C22 ( N06022 ) / C276 ( N10276 ) / C200 ( N06200 ) / X ( N06002 )
Nimonic
Nimonic 80a / Nimonic 90 / Nimonic 263
Titanium
Grade 1  /  Grade 2  /  Grade 4  /  Grade 5  /  Grade 7  /  Grade 9  /  Grade 12
Tantalum
R05200  /  R05252  /  R05255 /  R5400
Zirconium
R60702 /  R60705
Aluminum
Alloy 5022  /  Alloy 5083  /  Alloy 5086  /  Alloy 6061   /  Alloy 6066
Copper Nickel
C71500 (70:30) / C70600 (90:10)

Applications of Screwed Flange
Screwed Flanges are used for small sizes with high pressure flow preferable for chemical process plants, food & paint processing units and research institutes. Screwed Flange Connections allow recurring service where mounting & dismounting of joints are required.

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