Standards & Grades

What it covers

Seamless carbon-steel pipe intended for high-temperature service. The purchase description must include grade, NPS, schedule or wall thickness, length, ends and testing.

Common grades

Product forms

• Seamless pressure pipe
• Hot-finished or cold-drawn supply

Related dimensional / material references

• ASME B36.10M — pipe dimensions
• ASME B31 project piping code
• ASTM A234 WPB — matching butt-weld fittings

Check before ordering

• Grade and manufacturing route
• Schedule / wall thickness
• Hydro or permitted NDE
• MTC and supplementary requirements

What it covers

Stainless-steel pipe for corrosive and high-temperature service in listed austenitic grades and manufacturing routes.

Common grades

Product forms

• Seamless pipe
• Welded pipe
• Heavily cold-worked pipe

Related dimensional / material references

• ASME B36.19M — stainless pipe dimensions
• ASTM A403 — butt-weld fittings
• ASTM A182 — forged fittings and flanges

Check before ordering

• Exact TP grade and construction
• Schedule and NPS
• Heat treatment and surface condition
• PMI, IGC or supplementary tests

What it covers

Chromium-molybdenum and other ferritic alloy pipe used in boiler, power, refinery and high-temperature process systems.

Common grades

Product forms

• Seamless alloy-steel pipe
• Hot-finished or cold-drawn supply

Related dimensional / material references

• ASTM A234 WP11/WP22/WP91 fittings
• ASTM A182 F11/F22/F91 flanges
• ASME B36.10M dimensions

Check before ordering

• Grade and heat-treatment condition
• Hardness and PMI
• Schedule / wall thickness
• IBR and third-party requirements

What it covers

Seamless and welded steel line pipe for oil, gas, water and related pipeline transportation service.

Common grades

Product forms

• Seamless line pipe
• ERW / HFW line pipe
• SAW / LSAW / spiral line pipe

Related dimensional / material references

• ISO 3183 — line pipe
• Project pipeline code and data sheet
• Coating specification where applicable

Check before ordering

• PSL1 or PSL2
• Pipe body and delivery condition
• Diameter, wall and end finish
• Impact, sour-service and NDT requirements

What it covers

Indian standard commonly used for mild-steel tubes and related tubular products in light, medium and heavy classes.

Common grades

Product forms

• Black or galvanized steel tubes
• Screwed/socketed or plain-end supply
• Tubular fittings under applicable part

Related dimensional / material references

• IS 554 — pipe threads
• Project coating / galvanizing requirement
• Applicable IS 1239 part

Check before ordering

• Part number and class
• Nominal bore and end type
• Black or galvanized finish
• Hydraulic test and marking

What it covers

Large-diameter steel pipes for water, sewage, gas and selected industrial applications, typically manufactured by welded routes.

Common grades

Product forms

• ERW / HFW pipe
• SAW pipe
• Spiral welded pipe

Related dimensional / material references

• Project lining and coating specification
• IS 5504 / project flange requirements
• Approved welding and inspection plan

Check before ordering

• Grade, OD and wall thickness
• Manufacturing route
• Hydrostatic and NDT scope
• Internal lining and external coating

What it covers

Factory-made wrought carbon- and alloy-steel fittings for moderate and elevated-temperature pressure piping.

Common grades

Product forms

• Elbows
• Tees and crosses
• Reducers
• Caps and other wrought fittings

Related dimensional / material references

• ASME B16.9 — dimensions
• ASME B16.28 — short-radius fittings
• ASTM A106 / A335 matching pipe families

Check before ordering

• Grade and class designation
• Seamless or welded construction
• Schedule / matching wall
• Heat treatment and NDE

What it covers

Wrought stainless-steel fittings for pressure piping, supplied in material grades and fitting classes that identify construction and inspection.

Common grades

Product forms

• Seamless fittings
• Welded fittings
• Elbows, tees, reducers, caps and stub ends

Related dimensional / material references

• ASME B16.9 — dimensions
• MSS SP-43 — light-wall fittings
• ASTM A312 — matching pipe

Check before ordering

• Grade and fitting class
• Seamless / welded requirement
• Schedule and dimensional standard
• PMI, IGC and surface finish

What it covers

Dimensions, tolerances, ratings, testing and marking for factory-made wrought butt-welding fittings.

Common grades

Product forms

• Long-radius and short-radius elbows
• Tees and crosses
• Concentric / eccentric reducers
• Caps and returns

Related dimensional / material references

• ASTM A234 — carbon/alloy material
• ASTM A403 — stainless material
• MSS SP-43 — selected light-wall fittings

Check before ordering

• Nominal size and fitting type
• Schedule or matching wall
• Material specification and grade
• Seamless / welded construction

What it covers

Dimensions, ratings, tolerances and marking for forged socket-weld and threaded fittings.

Common grades

Product forms

• Elbows and tees
• Couplings and unions
• Caps, plugs and bushes

Related dimensional / material references

• ASTM A105 — carbon-steel forgings
• ASTM A182 — stainless/alloy forgings
• ASME B1.20.1 — NPT threads

Check before ordering

• Socket-weld or threaded type
• Class 2000 / 3000 / 6000 / 9000 as applicable
• NPT or specified thread
• Material grade and size

What it covers

Forged carbon-steel components such as flanges, forged fittings and valves for pressure systems.

Common grades

Product forms

• Flanges
• Forged fittings
• Valve and pressure-component forgings

Related dimensional / material references

• ASME B16.5 / B16.47 — flange dimensions
• ASME B16.11 — forged fitting dimensions
• MSS SP-97 — branch outlets

Check before ordering

• Heat-treatment requirement
• Flange type, class and facing
• Impact test / low-temperature needs
• UT, hardness and supplementary tests

What it covers

Forged or rolled alloy- and stainless-steel flanges, fittings, valves and parts for pressure systems.

Common grades

Product forms

• Flanges
• Forged fittings
• Valve parts and rings

Related dimensional / material references

• ASME B16.5 / B16.47
• ASME B16.11
• MSS SP-97

Check before ordering

• Exact grade and class
• Heat treatment
• PMI / ferrite / corrosion tests
• Flange dimensions, facing and pressure class

What it covers

Dimensions, ratings, materials, tolerances, marking and testing for pipe flanges and flanged fittings in listed sizes and classes.

Common grades

Product forms

• Weld-neck
• Slip-on
• Blind
• Socket-weld
• Threaded
• Lap-joint

Related dimensional / material references

• ASTM A105 / A182 material specifications
• ASME B16.20 / B16.21 gaskets
• ASME B16.47 for selected larger sizes

Check before ordering

• NPS and pressure class
• Flange type and facing
• Bore / schedule for weld-neck
• Material grade and dimensional edition

What it covers

Large-diameter steel flanges in Series A and Series B patterns for sizes beyond the common B16.5 range.

Common grades

Product forms

• Weld-neck flanges
• Blind flanges

Related dimensional / material references

• ASTM A105 / A182 material specifications
• ASME B16.20 gasket dimensions
• Project bolting specification

Check before ordering

• Series A or Series B
• NPS, class and facing
• Bore / wall thickness
• Material and bolt-hole pattern

What it covers

Bolting materials for pressure vessels, valves, flanges and fittings in elevated-temperature, high-pressure or special-purpose service.

Common grades

Product forms

• Stud bolts
• Threaded rod
• Bolts

Related dimensional / material references

• ASTM A194 — matching nuts
• ASME B16.5 flange joints
• ASTM F436 / project washer specification

Check before ordering

• Grade and class
• Diameter, thread series and length
• Nut grade
• Coating and service restrictions

What it covers

Stainless-steel flat products for pressure vessels, general applications and fabrication.

Common grades

Product forms

• Hot-rolled plate
• Cold-rolled sheet
• Coil and strip

Related dimensional / material references

• ASME Section II material adoption
• ASTM A480 general requirements
• Project finish and fabrication specification

Check before ordering

• Type / UNS grade
• Thickness and dimensions
• Finish and edge condition
• PMI, IGC, UT or flatness requirements

What it covers

Carbon-steel plates primarily intended for welded pressure vessels where improved notch toughness may be important.

Common grades

Product forms

• Pressure-vessel plate
• Normalized plate when specified or required

Related dimensional / material references

• ASTM A20 general requirements
• ASME Section VIII design code
• Project impact and UT requirements

Check before ordering

• Grade and thickness
• Normalized condition
• Impact-test temperature
• UT level and supplementary requirements

What it covers

Indian structural-steel plates, sections, flats and related hot-rolled products for welded and general engineering structures.

Common grades

Product forms

• Plates and sheets
• Angles, channels and beams
• Flats and structural products

Related dimensional / material references

• IS 808 — section dimensions
• Project welding specification
• Applicable product tolerances

Check before ordering

• Grade, quality/subgrade and thickness
• Impact requirement
• Killed / semi-killed condition as applicable
• Dimensions and mill test certificate

What it covers

Duplex and super-duplex stainless pipe for general corrosive service, supplied seamless or welded in listed UNS grades.

Common grades

Product forms

• Seamless duplex pipe
• Welded duplex pipe

Related dimensional / material references

• ASTM A815 — fittings
• ASTM A182 F51/F53/F55 — flanges
• ASTM A923 — selected intermetallic-phase tests

Check before ordering

• UNS grade and construction
• Heat treatment
• Ferrite and corrosion testing
• NDT, hydro and PMI

What it covers

Seamless pipe and tube in nickel alloy UNS N06625 and related grades for severe corrosion and high-temperature applications.

Common grades

Product forms

• Seamless pipe
• Seamless tube

Related dimensional / material references

• ASTM B366 — nickel-alloy fittings
• ASTM B564 — forgings and flanges
• ASME B36.19M / purchase dimensions as applicable

Check before ordering

• Grade and product form
• Condition / heat treatment
• Dimensions and tolerances
• PMI, NDT and corrosion requirements