General 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
  - Seamless butt-welding fittings are produced from seamless tube and pipe 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
  - Welding is carried out by Code-Qualified personnel (ASME Code Section Ⅸ- 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.
• Marking
  - 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.
• Certification
  - 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.
• Packing
  - The utmost care is taken to ensure that butt-welding fittings are fully protected against damage during transit.

REDUCER 10bar and 14bar
- MATERIAL : Cu-Ni 90/10, Cu-Ni 70/30
- DIMENSION : DIN 86089
. 1/2" ~ 10 " : SEAMLESS TYPE
. 12" & OVER : SEAM WELDED TYPE

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CONCENTRIC REDUCER - 16bar
- MATERIAL : Cu-Ni 90/10, Cu-Ni 70/30
- DIMENSION : EEMUA Pub. No. 146
. 1/2" ~ 12 " : SEAMLESS TYPE
. 14" & OVER : SEAM WELDED TYPE

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CONCENTRIC REDUCER - 20bar
- MATERIAL : Cu-Ni 90/10, Cu-Ni 70/30
- DIMENSION : EEMUA Pub. No. 146
. 1/2" ~ 12 " : SEAMLESS TYPE
. 14" & OVER : SEAM WELDED TYPE

Click to open expanded view