Uniland Tubing CO.LTD

carbon steel flange

The welding neck flange is normally referred to as the "high hub" Flange. It is designed
to transfer stresses to the pipe, thereby reducing high stress concentrations
at the base of the Flange. The welding neck flange is the best designed butt-welded
flange of those currently available because of its inherent structural
value. It is expensive because of the design.
Threaded (Screwed) Flanges:
The threaded flange is similar to the slip-on flange, but the bore is threaded. Its
chief merit is that it can be assembled without welding, explaining its use in
low pressure services at ordinary atmospheric temperatures and in highly explosive
areas where welding create a hazard
 Process: Free Forging, Mould Forging, Upset Forging.

Main Material:

Carbon Steel,

ASTM A 105, ASTM A 350 LF1, LF2 CL1/CL2, LF3 CL1/CL2

ASTM A 694 F42, F46, F52, F56, F60, F65, F70

Stainless Steel,

ASTM A 182, ANSI 304, 304L, 304H, 304LN, 309S, 309H, 309Cb, 309HCb, 310S, 310H, 310Cb, 310HCb, 316, 316L, 317,317L, 321, 321H, 347, 347H, 347LN, 348, 348H, 904, 904L etc.

Alloy Steel,

ASTM A182 F1, F5a, F9, F11, F12, F22, F91

Duplex stainless steel,

Duplex 2205 UNS S31803/S32205 ASTM A 182 F51 318LN DIN 1.4462 SAF2205 SA182 F51

Super duplex stainless steel,

Super duplex 2507 UNS S32750 F53 ASTM A182 F53 SAF2507 SA182 F53 DIN 1.4410

about us 

Unilandtubing co, Ltd is one of professional enterprises specializing in flanges and pipe fitting .  Our entire flange s are designed and manufactured according to ASME (ANSI) ,API , BS , DIN, JIS standards .  

In order to make our products perfectly ,we use new production equipment  ,which can enhance the quality of products to meet industrial application requirement.

Also we ensure the best quality for customers ,and our strict quality assurances systems are conducted throughout the entire production at the standard of ISO 9001: 2000 

We try to enlarge our overseas market ,and we have received a good reputation from our customers in the USA, Europe ,the UK,Southeast Asia , ,South America etc.