Product Description

Roll bending is regularly used for large construction pieces. The process begins with the edge trimming of the steel plate to the required width, then three rolls are positioned as a pyramid and can produce a very specific radius. to later be welded by the Double Submerged Arc Welding process. Our experience includes the following listed items and customised requirements to meet client’s specific needs.

• Lobster back elbows
• Tees, equal and reducing
• Wye branches and bifurcations
• Concentric and eccentric reducers
• Manifolds and headers
• Dismantling joints and Expansion joints
• Structural attachments, supports, lifting lugs, weld collar bands and thrust/weep flanges
• Combi piles
• Foundation piles for jetties, offshore platforms and LNG terminals
• Mooring piles, dolphins, etc.
• Foundation piles for bridges and onshore foundations
• Micro piles
• Struts in building pits

 

       1.Pipe Specification

• API 2B Specification for the Fabrication of Structural Steel Pipe
  ASTM A139 CHIMNEYS AND VENTILATION DUCTS for air and dust filtering systems, and smoke evacuation, PILLARS for ski chair-lifts and bridges
  ASTM A252 Foudation Piles for soil consolidation, marine wharfs---Grade1, Grade 2, Grade 3
  ASTM A500 Cold Formed Welded and Seamless Carbon Steel Steel Structural Tubing in Round and Shapes
  AWWA C200 : Steel Water Pipe 6 inches and Larger
  AS1579 Arc-Welded Steel Pipes and Fittings for Water and Wastewater
  AS 2159 Piling Design and Installation
  AS 812 Bored Piles
  BS 534 : Steel Pipes and Specials for Water and Sewage
  BS 6363 Welded Cold Formed Steel Structural Hollow
  CSA G40.21-92-CAN CSA-1992 structural quality steels general instruction no 1-2; and 4
  DIN 1626 WELDED CIRCULAR TUBES OF NON ALLOY STEELS WITH SPECIAL QUALITY EQUIREMENTS
  DIN 2460 Steel tubes for waterworks services
  EN 10219 Cold formed welded structural hollow sections of non-alloy and fine grain steels--S235, S235JR, S235 G2H, S275, S275JR, S355JRH, S355J2H
  EN 10224 Steel pipes, joints and fittings for the conveyance of aqueous liquids including potable water
  EN 10296-1 Welded steel tubes for mechanical and general engineering purposes – TDR. Part 1: Non alloy and alloy steel tubes
  IS 4923 Steel tubes for Hollow sections used in structures
  JIS G3444 : Carbon Steel Tubes for General Structural Purpose---SS330, SS440, SS490, SPHD, SPHE
  JIS G3457 : Arc Welded Carbon Steel Pipes
  JIS A5525 : Steel Pipe Piles
  KS D 3566 Carbon Steel Tubes for General Structural Purpose- STK 90,400,490,500,540
  KS D 3583 Arc Welded Carbon Steel Pipe- SPW 400
  KS F4602 Steel Pipes Piles
  KS F4605 Steel Pipe Sheet Piles
  TIS 427 : Electrically Welded Steel Water Pipes
  MWA : Metropolitan Waterworks Authority of Thailand
  PWA : Provincial Waterworks Authority of Thailand
  RID : Royal Irrigation Department of Thailand
  EGAT : Electricity Generating Authority of Thailand
  
  
  2. Coating Specifications
  2.1.External Coating
  2.1.1 External Epoxy Coating
  CAN/CSA-Z245.20 Standard for External Fusion Bond Epoxy Coating for Steel Pipe
  AWWA C210 Standard for Liquid-Epoxy Coating Systems for the Interior and Exterior of Steel Water Pipelines
  AWWA C213 Standard for Fusion Bonded Epoxy Coating for the Interior and Exterior of Steel Water Pipelines.
  NACE RP0394 – National Association of Corrosion Engineers Standard Recommended Practice, Application, Performance, and Quality Control of Plant Applied, Fusion Bonded Epoxy External Pipe Coating.
  NACPA 12-78 – National Association of Pipe Coating Applicators External Application Procedure for Plant Applied fusion Bonded Epoxy (FBE) to Steel Pipe.
  
  2.1.2 Polyethylene Coating
  CAN/CSA Z245.21 External Polyethylene Coating for Pipe
  DIN 30670 Polyethylene Sheathing of Steel Tubes and of Steel Shaped Fittings
  NFA 49-710 External Three-Layer Polyethylene Based Coating, Application by Extrusion
  AS/NZS 1518 External Extruded High-Density Polyethylene Coating System for Pipes
  UNI 9099-DIN 30670 Polyethylene Coating Applied by Extrusion
  
  2.1.3 Polypropylene Coating
  DIN30678 Polypropylene Sheathing of Steel Tubes and of Steel Shaped Fittings
  EN 10286 Steel tubes and fittings for onshore and offshore pipelines –External three layer extruded polypropylene based coatings.
  NFA 49-711 External Three-Layer Polypropylene Based Coating, Application by Extrusion
  09-SAMSS-114 Shop-Applied Extruded, Three-Layer Polypropylene External Coatings for Line Pipe
  
  2.1.4 Polyurethane Coating
  AWWA C222-99: Polyurethane Coatings for the Interior and Exterior of Steel Water Pipe and Fittings
  BS 5493- Polyurethane Coating
  DIN 30677.2 polyurethane Insulation of the fittings
  EN 10290- External Liquid Applied Polyurethane Coatings
  
  2.1.5 Polyolefin Coating
  AWWA C225-03: Fused Polyolefin Coating Systems for the Exterior of Steel Water Pipelines
  AWWA C215-99: Extruded Polyolefin Coatings for the Exterior of Steel Water Pipelines
  AWWA C216-00 Standard for Heat-Shrinkable Cross-Linked Polyolefin Coatings for the Exterior of Special Sections, Connections, and Fitting for the Steel Water Pipelines
  AWWA C224 - 01: Two-layer Nylon-11 Based Polyamide Coating System for Interior and Exterior of Steel Water Pipe and Fittings
  AWWA C225 - 03: Fused Polyolefin Coating Systems for the Exterior of Steel Water Pipelines
  
  2.1.6 Tape Coating
  AWWA C209-00: Standard for Cold-Applied Tape Coatings for the Exterior of Special Sections, Connections, and Fittings for Steel Water Pipelines
  AWWA C214-00 Standard for Tape Coating Systems for the Exterior of the Steel Water Pipelines
  AWWA C217-99 Standard for Cold-Applied Petrolatum Tape and Petroleum Wax Tape Coatings for the Exterior for Special Sections, Connections, and Fittings for Buried/Submerged Steel Water Pipelines
  AWWA C218-02 Standard for Coating the Exterior of Aboveground Steel Water Pipelines and Fittings
  AWWA C224-01: Two-layer Nylon-11 Based Polyamide Coating System for Interior and Exterior of Steel Water Pipe and Fittings
  
  2.1.7 Bitumen Coating
  DIN 30673 Bitumen coatings and linings for steel pipes, fittings and vessels.
  
  2.1.8 Coal-Tar Enamel Coating
  AWWA C-203 Coal-Tar Protective Coatings and Linings for Steel Water Pipelines-Enamel and Tape-Hot-Applied
  AWWA C205 Cement Mortar Protective Lining and Coating for Steel Water Pipe - 4 inch (100 mm) and Larger- Shop Applied
  
  2.1.10 Marine Coating
  EN ISO 12944:1998 – Paints & Varnishes – Corrosion Protection of Steel Structures by protective paint system (parts 1 – 8)
  ISO 20340:2009 Paints and varnishes – Performance requirements for protective paint systems for offshore and related structures
  ISO 15741 Paints and varnishes-Friction-reduction coatings for the interior of on- and offshore pipelines for non-corrosive gases
  
  2.2. Internal Coating
  
  2.2.1 Epoxy Lining
  AWWA C210: Liquid-Epoxy Coating Systems for the Interior and Exterior of Steel Water Pipelines
  
  2.2.2 Bitumen Lining
  DIN 30673 Bitumen coatings and linings for steel pipes, fittings and vessels
  UNI-ISO 5256/87 STANDARD-BITUMEN COATING

• 2.2.3 Cement Mortar Lining
          AS 1281 Cement Lined Pipes and fittings
         AS/NZS 1516 Cement Mortar Lining of Pipelines In Situ
         AWWA C203 Coal-Tar Protective Coatings & Linings for Steel Water Pipelines, Enamel & Tape, Hot-pap. 
         AWWA C205Cement-Mortar Protective Lining and Coating for Steel Water Pipe- 4 In. (100 mm) and Larger-Shop application
        AWWA C602 Standard for Cement-Mortar Lining of Water Pipelines - 4 inch (100 mm) and Larger - In Place

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