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Flanges
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Genaral Information of Flanges
The national and international standards to which the flanges are produced are detailed in the relevant product tables.
 
 
 
Materials
Applied Code
Cu-Ni 90/10
EEMUA 7060X, Din CuNi10Fe1Mn,
ASTM B151 C70600, JIS H3300 C7060,
BS 2872 CN102
Cu-Ni 70/10
ASTM B151 C71500, Din CuNi30Mn1Fe,
BS 2872 CN107, JIS H3300 C7150
Cast bronze
ASTM B61, B62, BS 1400 LGC, JIS H5111 BC1 ~ BC7
Leaded yellow brass
ASTM B584 C85400, JIS H5101 YBSC (CAC202)
Steel
ASTM A105, JIS G3101 SS400
 
Composite Flanges
Composite weld-neck and composite slip-on flanges are made up from two components, an internal flanges (welding collar) in Cu-Ni 90/10, Cu-Ni 70/30 and an external flange in carbon steel.
Composite blind flanges are made up from a carbon steel blind flange overayed-on, and machined disc in Cu-Ni 90/10 or Cu-Ni 70/30.

Solid Flanges
Solid flanges in Cu-Ni 90/10 or Cu-Ni 70/30 are produced from bar by hot forging and machining, Solid flanges in bronze are produced by casting and machining. Solid flanges in Leaded yellow brass are produced by extrusion bar and machining.

Solid Silver-Brazing Flanges
Solid silver brazing flanges incorporate integral silver-brazing alloy rings and under normal circumstances.
There is generally no need to socket feed with additional brazing alloy. The silver brazing alloy to AWS A5.8(BAG1, BAG7), JIS E3261 (BAG1, BAG7) or BS1845 (AG1, AG7).

Product Range
Composite and solid flanges are available in standard sizes machining those of the relevant pipe and butt welding fittings.
Non-standard size flanges are produced to certain minimum quantity limitations, availability on application.

Joint facing
All flange jointing faces are machine finished according to ASME B16.5 including smooth finish.

Inspection and Testing
A Series of stringent quality-control inspections and tests is performed throughout the entire manufacturing process, from melting and alloying to the finished product to ensure product quality which complies with the customer's requirements. Final inspection generally includes visual and dimensional control as well as chemical and mechanical tests to ensure chemical, physical and dimensional accuracy.

Certification
All flanges are supplied with a certificate listing the tests which have been performed in accordance with relevant specifications and / or customer requests.

Packing
The utmost care is taken to ensure that butt-welding fittings are fully protected against damage during transit.
 
 
 
 
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