B/W Fittings
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Genaral Information of Butt Welding Fittings
Butt welding fittings meet the following national and international product standards;
Production to other standards specifications may be supplied upon special agreement
  Seamless Butt-Welding Fittings
by either hot or cold extrusion, forming, machining, or by a combination of two or more of these operations.

Seam-Welded Butt-Welding Fittings
Seam-welded butt-welding fittings are produced from hot or cold rolled annealed and pickled sheet or plate,formed into half shells or segments and longitudinally seam-welded.

Butt-welding fittings are available in standard size, as published in this catalogue , and in nonstandard sizes.
Standard sizes fittings are generally available ex-stock.
Non-standard size fittings are produced subject to certain minimum quantity limitations.
Details are available on application.
Welding is carried out by Code-Qualified personnel(ASME Code Section - Boiler and Pressure Vessel) whose qualification are regularly checked and approved.
Established welding methods include pulsed TIG and shielded electrode techniques.

End Preparation
Unless otherwise agreed, butt-welding fittings are supplied with plain ends. Cut square and deburred at a wall of 2mm below
Alternatively, fittings with a wall thickness of 2.0mm and above can be supplied with beveled ends to ASME B16.25.
Applied Code
Cu-Ni 90/10
ASTM B466, B467 C70600
BS 2871, 2872,2875 CN102
JIS H3300 C7060
Cu-Ni 70/30
ASTM B466, B467 C71500
BS 2871,2872,2875 CN107
JIS H3300 C7150
DIN 86011,86087,86088, DIN 86089,86090
ASME B16.9,B16.28
JMS 7354
All butt-welding fittings are marked with Alloy No, Lot No, Nominal Diameter, Degree and maker's trade mark.
Additional information, e.g standard and alloy number, maximum pressure rating, can be added on request.

Inspection and Testing
Throughout the manufacturing process, from melting and alloying to the finished product, stringent quality control inspections and tests are carried out to ensure that product quality complies fully with customer requirements.
All tests are performed in accordance with the requirements of the relevant specification.

Fittings are supplied with a certificate listing the tests which have been performed in accordance with proper specifications or customer's specifications.

Supply Condition
Unless otherwise agreed, seamless butt-welding fittings are supplied. Heat-treatment scale is removed.
Seam-welded butt-welding fittings are supplied in the as-welded condition.

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