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Stainless Steel Welded Pipes

welded-pipeCitizen Metals  is one of the major manufacturers of  Welded Stainless Steel Pipes for application in Power generation – Nuclear, Thermal and Solar, Refinery and Petrochemical, Oil and Gas, Chemical and Fertilizer and Process Industries etc.

Citizen Metals manufactures Austenitic, Super Austenitic, Duplex and Super Duplex welded stainless steel pipes both from coil and plate. The weld procedures used are TIG, Combination of Plasma and TIG , TIG with filler , TIG and SAW , SAW depending up on the wall thickness of input raw material for Pipe manufacturing.

The welding process is controlled by laser seam tracking equipment to optimize the quality of weld seam. Stainless Steel Welded Pipes above 40″ NB & up to 72″ NB can be manufactured with a combination of longitudinal / circumferential joints.

Salient Features:
  • Radiography/Radioscopy to ensure Welding quality
  • Solution Annealing Heat treatment facility upto 100″ NPS
  • Hydro Test
  • Ultrasonic and Eddy Current Test can be done as per Client requirement
  • In-house testing facility to meet International Standard
  • Various Sizes and Grades of Austenitic , Super Austenitic ,Duplex and Super Duplex Stainless Steel
  • Ability to manufacture pipes as per API 5LC with Coating facility

 

Manufacturing  Range:
Welded Pipes : 
 
SIZE / RANGE THICKNESS SPECIFICATION
1/8″ NB to 1″ NB SCH.5S, 10S, 40S ASTM A-312, A-554, A-778,
A-790
API 5LC
Above 1″ NB to 2″ NB
Above 2″ NB to 18″ NB
18″ NB to 36″ NB
Grades : TP-304/L/LN/H/N, TP-316/L/LN/H/N/Ti, TP-317L, TP-321/H, TP-347/H,
UNS S31254
UNS N08367
UNS S31500, S31803, S32205, S32750, S32760
* Sizes and Specifications other than above can be manufactured on request

 

Large Diameter Electric Fusion Welded (EFW) Stainless Steel Pipes : 
 
PRODUCTS SIZE / RANGE THICKNESS SPECIFICATION
Longitudinal Pipes 8″ NB to  40″ NB 2.77 MM to 50.00 MM ASTM A-358, A-409,
A-778,
A-928, API 5LC
Longitudinal with Circumferential Seam Welded Pipes 20″ NB to 72″ NB 5.54 MM to 20.00 MM ASTM A-358, A-409,
A-778
Grades : TP-304/L/LN/H, TP-316/L/LN/H, TP-317L, TP-321/H, TP-347/H, UNS S31254, UNS N08367
S31803,S32205,S32750,S32760
* Sizes and Specifications other than above can be manufactured on request

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Stainless Steel Welded Tubes

welded-tubeCitizen Metals is having dedicated facility for manufacturing Stainless Steel Welded Tubes using TIG and LASER Welding.

The manufacturing facility is equipped with the state of art Coil Slitting Line, which plays an important role for manufacturing welded tubes. Citizen Metals is having the latest generation Tube Mills using On-Line Bright Annealing, On-Line Eddy Current Testing, Two Axis Dimension check including ovality resulting into closer dimensional control.

Citizen Metals is also having facility of High Speed Draw Benches for manufacturing Welded and Cold Drawn Tubes in Austenitic and Duplex Stainless Steels in longer length, Off-Line Bright Annealing , Off-Line Eddy Current Testing,Off-Line Ultrasonic Testing etc.

Common Features :
  1. Good Surface Finish
  2. Good Corrosion Resistance
  3. In-house “U” bending facility and “U” bend stress relieving
  4. Ability to produce tubes with stringent NDT requirements of the Client
  5. Ability to handle various Grades of Stainless Steel
  6. Stabilization Heat Treatment facility for Stabilized Stainless Steel Grades

 

Salient Features :
Power Plants
 

Stainless Steel Welded Condenser Tubes

  • Capabilities to manufacture tubes having wall thickness from 0.40 mm to 2.00 mm.
  • Straight Length upto 25 meters

 

Stainless Steel Seamless LP and HP Heater Tubes

  •  Capabilities to supply tubes with Very Low Residual Stress Values leading to longer service life
  • Capabilities to manufacture tubes having wall thickness from 0.40 mm to 2.00 mm
  •  Closer dimensional tolerances
  •  Dedicated facility for manufacturing Tubes in U bend Solution Annealed condition upto developed length of 36 meters
  • Capabilities to supply Ferritic Stainless Steel tubes for Nuclear Power Plant

 

Stainless Steel Welded HP Heater Tubes

  • Capabilities to supply tubes with Very Low Residual Stress Values leading to longer service life
  • Fully recrystallized microstructure in weld, improving corrosion resistance of Heater Tubes
  •  Closer dimensional tolerances due to Cold drawn tube
  • Dedicated facility for manufacturing Tubes in U bend Solution Annealed condition upto developed length of 36 meters
  • Capabilities to supply Ferritic Stainless Steel tubes for Nuclear Power Plant
  • Capability to supply tubes with Special Chemistry

 

General Industries
  • Manufacturing capabilities to supply Ferritic Stainless Steel tubes for Desalination Plant
  • Manufacturing capabilities to supply Duplex Welded and Cold Drawn Tubes for Oil and Gas Sector
  • Manufacturing capabilities to supply Lean Duplex tubes for Process Industries

 

Manufacturing Range
SIZE / RANGE THICKNESS SPECIFICATION
10.00 MM to 76.00 MM OD 0.50 MM to 4.00 MM ASTM A-249, A-268, A-269, A-270, A-554, A-688, A-789, A-803
EN-10217-7
U-Tubes as per Customer’s Drawing.
Grades : TP-304/L/LN/H/N,TP-316/L/LN/H/N/Ti,TP-317L,TP-321/H,TP-347/H, UNS S31254
& Various grades as per European Norms
TP-409, TP-410, TP-430Ti, TP-439, UNS S44735
UNS S31803, S32205, S32750, S32760
* Sizes and Specifications other than above can be manufactured on request