Highest Grade Of Stainless Steel Pipe 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 

Highest Grade Of Stainless Steel Pipe 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

Highest Grade Of Stainless Steel Pipe 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

Stainless Steel Pipes Mechanical Properties