Reliable Pipes & Tubes Ltd. started its manufacturing unit a decade ago for STAINLESS STEEL ERW PIPES & TUBES with production ranging from 1/4" NB to 8"NB manufactured on fully automated tube mills of TIG welding without any addition of filler metal (A 312). Our products are in close contact with the manufacturer having the manufacturing facility from 10" NB to 24" NB with the addition of filler wire.(A 358).

Technical Data

S.S Schedule Piping to ASTM A-312 (ERW)

Introduction & Scope
This covers straight seam welded (without the addition of filler metal) authentic stainless steel pipe intended for high temperature and general corrosive service.

Material
Material is ordered to comply with the requirement of ASTM A-240 in 304, 304L, 316 and 316L grades regularly. Special grades can be made as per Customer's requirements.

Size Range
OD : ½" NPS (21.3 mm) to 8" NPS (219.1 mm)
Thick : NB size in schedule 5 10 S & 40S
Length : As per Customers Requirement.

Process of Manufactures
The pipe is manufactured from annealed strips on modern continuous forming mills with TIG welding process under inert gas atmosphere. All pipes are annealed at a minimum temperature of 1040°C, straightened, pickled and passivated, end finished & 100% tested in accordance with ASTM A-530

Tolerances

Test
Normal : Tensile strength / Yield strength / Elongation, Flattening, Hydrostatic Pressure
Optional : Pneumatic / Air leakage, Eddy current, IG Corrosion.

Standard Weight Chart

Technical Data

S.S Fusion Welded Pipe from Plates as per ASTM A -358

Introduction & Scope
This covers electric - fusion welded authentic Chromium-nickel stainless steel pipe suitable for corrosive or high temperature service, or both. Five classes of pipe are covered under this specification.

Introduction & Scope
Class 1 : Double side welded using filler Material and 100% radiography
Class 2: Double side welded using filler Material. No radiography required
Class 3 : Single side welded using filler Material and 100% radiographed.
Class 4: As class 3, Accept root pass may be made without filler
Class 5: Double welded using filler Material and spot radiographed

Material
This specification covers nineteen grades of Material steel. The plate material comply with there requirements of ASTM A-240. Most commonly manufactured grades are 304, 304L, 304H, 316L 310

Size Range
OD : 10" NPS (273.05 mm) to 24" NPS (609.6 mm)
Thick : NB Size in Schedule 5, 10S, 10 and 40 S
Length : As per customer specification

Process of Manufactures
The pipes are manufactured from leveled plates which are edge beveled and progressively "O" formed on hydraulic presses. The edges of he pipe are either manually TIG welded or continuously welded on Track and Boom. Weld portion is radiographed as per requirement. Annealing of pipe is carried our on continuous furnace. Pipe is further straightened, sized, end finished, pressure tested, pickled and passivated, marked and packed.

Tolerances
OD : + ± 0.5% of specified diameter based on circumferential measurement.
Thick : Minimum thickness at any point not more than 0.3 mm under nominal thi
Out of Roundness : difference between maximum and minimum OD 1%
Straightness : 3 mm in 3 mtrs
Length : As per customer specification

Test
Transverse bend weld tests
Transverse tension test to ASME code IX para QW 150.
Hydrostatic Test ASTM A-530
Radiographic classed 1,3 to ASMIE Code VII para UW 51, Class 5 to ASME Sec. VII para UW 52

• Our mission is to supply RELIABLE quality pipes & tubes at affordable cost to cater the needs of nation.
  
• Our Goal is to emerge as market leader by preserving the confidence of our valued customers.
  
• We shall endeavor to continually improve through group efforts.
• We are committed to develop, implement and maintain an effictive Quality Management System in compliance with ISO 9001:2008 Standard

Quality Assurance Plan