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Welded Constructions


Following a long experience on Non-Destructive Testing and weld repairs of all types of steels, Mascia NDT has recently restarted to operate in the welding constructions field, which represents the background of its more than thirty-year activity.

Since the last year, Mascia NTD & Welded Constructions  has obtained additional qualifications for welders, welding operators and welding procedures, according to ASME IX and EN 15614 std


WELD PROCESS

ASME 

EN

Gas Tungsten Arc Welding

GTAW

141

Shielded Metal Arc Welding

SMAW

111

Gas Metal Arc Welding

GMAW

131-135

Submerged Arc Welding

SAW

121

The qualifications cover the requirements for  important industrial branches and plant   e.g., power, oil & gas, chemical, petrochemical, and different materials,  e.g., carbon steels, low-alloy steel  (gr.11, 22, 91) and stainless steel (including applicable Post Weld Heat Treatment), for thickness up to 200 mm.

If the order concerns special alloys or specific types of welding, Mascia NDT can   rapidly obtain the dedicated qualifications.

The company is skilled in the execution of welds according to the most modern technologies. It can also assemble  components such as valve bodies, tanks, piping, flanges, fittings etc.

Mascia NDT can completely execute constructions basing on the Customer’s designs.  It can buy materials according to drawings, specifications and instructions or also assemble finished or semi-finished products supplied by the Customer.

Since long time Mascia NDT has been performing all type of Non Destructive Testing employing qualified personnel (internal IIIrd level - ASME EN).

Any construction can be quickly verified with different types of NDT tests,e.g., penetrant liquids (PT), ultrasonic (UT), magnetic (MP), visual (VT) radiographic (RT), for small, medium and high thickness (up to 300 mm), certifying the full compliance of materials and welds.

When request Mascia NDT can also perform the Post Weld Heat Treatment and further checks such as dimensional, hardness, PMI etc.

Main components of possible production and supply

Mascia  NDT is specialized in the manufacturing of important welded construction. Components or apparatus that can be integrally produced by Mascia NDT & welded construction,  including:
- Very thick and rating Valves Bodies and Bonnets
- High-Medium capacity tanks
- Welded Steel Pipe
- Connecting pipes
- Flanged or buttwelded reduction
- Construction on customer drawing

As above said, such constructions are made by assembling materials supplied by the customer or providing fully finished components according to customer drawings and specifications, acquiring the necessary materials, machining, welding, PWHT, NDT and sandblasting, all in accordance with the requirements of customers.

 

 

Here below some examples of recently made welded construction:

 

welded constructions

 

 

Preparation, assembling, welding, UT and RT of DN 18” and 26” Rating class ANSI 3250 – Material ASME SA 105 – ASME SA 182 F91 – Welded thickness 150 and 215 mm.

welded constructions

 

 

Examination by linear accelerator on weld over 200 mm thick

 

 

Delivering

 

 

Complete machining and welding of desuperheating chamber welded on globe valve.

 

 

Welding of reducers on cast valve bodies and welded flanged curve checked by RT/PT/MP/ Hardness

 

 

Assembling, welding checks and inspection of tanks, pipe, dished ends made of carbon steel, stainless steel and NDT

 

References:


The main customers which have already been supplied welded components are:

  1. Firsa
  2. A.s.t.r.a. Refrigeranti
  3. Pentair
  4. Parcol
  5. Bonetti

The Mascia NDT has long time been recognized not only for the quality of its work, but also for its great flexibility and the prompt deliveries.

 



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