Welding Overlays

Sivan Engineering PTA WELDING MACHINE SERVE HARDFACING OVERLAY (STELLITE) to extruding screws, valves and seats, power generation, Process equipment cement production, forging dies, pulp and paper industry equipment, and agricultural equipment.

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Traditional Welding And Overlays


GTAW (Tig), GMAW (Mig), and SMAW (Stick) weld overlay materials, although not as high in performance as that of PTA, have made many advancements in recent years, and due to lower equipment set up costs are still in wide spread use in industry

We have integrated the TIG & Mig welding process with our custom designed Automation equipment to ensure highest quality results with predictable repeatability.

Sivan Engineering can provide these services as a cost effective alternative to PTA hard facing when the application if better suited or more efficient utilizing these traditional means. On parts not economical to set up with automation ( small / Odd shaped ), We have the expertise to apply these products manually, so we can get into the most unusual places with a desired coating. Another option we commonly offer, is to use traditional welded overlays in conjunction with PTA to get full coverage on parts or in areas hard to reach by the automated.

Compact Cladding Tig

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Component Data

Max. Component Height 1900mm

Minimum Bore Diameter 25mm

Maximum Outside Diameter 1000mm

Maximum Weight 2.5 Ton

Tig Weld Cladding overlay

Sivan Engineering is one of the world’s most advanced solutions providers for protective compact weld cladding of Valve Body and components, and offers the largest weld overlay capacity in the industry today to meet the growing demands of our clients for corrosion resistant alloy clad Valves & Pipes.

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The Valve & Pipe Cladding equipment has the latest in built technology, which significantly increases our production rates, ensuring lower base metal heat input through the welding process, hence achieving lower Fe% dilution and increased travel speeds.

Our automated protective clad surfacing systems apply high integrity corrosion resistant alloys, including Inconel 625 and 825, Alloy C276 and C22, 300 and 400 series Stainless Steels.

This can be applied to a variety of substrates such as:

  • Carbon Manganese
  • Low Alloy
  • Martensitic
  • Ferric Stainless Steels

Cladding material types and thicknesses can be selected to meet the specified environment and with our unique capabilities enables us to clad I.D sizes from 25mm up to 1000mm for 2mtr Length.

Machine Shop

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Sl. No Machine Name Make Machining Range (X Y Z) Individual Component Weight can be handled Geometrical Tolerances Can be achieved
1 Lathe-1 Rajendra Center Height: 12 inch Bed Length: 12 Feet 750 Kgs ± .05 mm
2 Lathe-2 Rajendra Center Height: 15 inch Bed Length: 16 Feet 1 Ton ± .05 mm
3 CNC Lathe LMW Center Height: 30 inch Bed Length: 3 Feet 2 Tons ± .05mm
4 Vertical Machining Dahlih X:2000 mm, Y: 650 mm Z: 650mm 4 tons ± .01 mm
Machine Name: Lathe-1 Make: Rajendra Machining Range (X Y Z): Center Height: 12 inch Bed Length: 12 Feet Individual Component Weight can be handled: 750 Kgs Geometrical Tolerances Can be achieved: ± .05 mm
Machine Name: Lathe-2 Make: Rajendra Machining Range (X Y Z): Center Height: 15 inch Bed Length: 16 Feet Individual Component Weight can be handled: 1 Ton Geometrical Tolerances Can be achieved: ± .05 mm
Machine Name: CNC Lathe Make: LMW Machining Range (X Y Z): Center Height: 30 inch Bed Length: 3 Feet Individual Component Weight can be handled: 2 Tons Geometrical Tolerances Can be achieved: ± .05 mm
Machine Name: Vertical Machining Make: Dahlih Machining Range (X Y Z): X:2000 mm, Y: 650 mm, Z: 650mm Individual Component Weight can be handled: 4 Tons Geometrical Tolerances Can be achieved: ± .01 mm

Manufacturing & Welding

With a proven track record of excellence, we specialize in providing End-To-End Manufacturing & Welding Services, from meticulous planning to flawless execution.

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Our services include but are not limited to the following

  • Design Calculations, FEA & Detailed construction drawings according to the relevant code & and specifications.
  • Fabrication & Welding in accordance to relevant code / approved drawings/class rules All raw materials with EN 10204 3.1 / 3.2 Certifications.
  • Material and Weld Traceability Shell rolling and Dish head forming
  • NDE: 100 % RT / UT / PT / MPI / PMI
  • Precise machining
  • Post-weld heat treatment
  • Hydro test / Pneumatic Test/ Gas leak test
  • Blasting / Painting / Hot Dip Galvanizing / Special coating for carbon steels
  • Pickling & Passivation / Glass Bead Blasting for stainless steels
  • Polishing of stainless steel products

Product Range

We have the necessary capacity, qualifications, and skills to provide products and services

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including, but not limited to

  • ASME / EN Pressure Vessels
  • Storage Tanks
  • Filter housings of CS & SS
  • Air Receivers
  • API Plan Skids
  • Columns & Reactors
  • Piping fabrication and erection of CS & SS, Alloy Steels
  • Pump/ Valve Components
  • Machinery Parts
  • Specialty Valve Fabrications

Materials


EN 10204 Type 3.1 & 3.2 Certified

  • Carbon Steels
  • Stainless Steels
  • Alloy Steels
  • Exotic Materials

We Serve

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Industries We Serve


  • Oil & Gas
  • Refineries
  • Chemical
  • Petro-Chemical
  • Water Treatment
  • Fertilizers
  • Valve & Pump Industries

International Codes We Follow


  • ASME/ ASTM
  • PD 5500/ EN ISO/ PED
  • AD 2000 Merk Blatter
  • DIN
  • IS/ IBR
  • API
  • TEMA

Material of Construction


  • Carbon Steels/ NACE & HIC Resistant CS
  • Chrome-Molly Steel for High Temperature Service
  • Stainless Steel Grades
  • Duplex & Super Duplex SS
  • Monel, Inconel Alloys
  • Nickel, Nickel Alloys