ASTM a691 grade 91 pipe

ASTM A691 Grade 91 Pipe

The pipes are very much in demand due to their excellent corrosion resistance property and high durability. ASTM A691 Grade 91 Pipe is basically a steel pipe specification which are electric fusion welded (EFW) with addition of filler metal and fabricated from pressure vessel quality plate and are highly compatible for wide range of high-pressure applications at different temperature conditions. Due their strong mechanical properties the pipes function efficiently in wide range of high temperature applications. Alloy EFW steel Pipes exhibits absolute toughness and are resistant to wear and tear. The addition of molybdenum, manganese, carbon and vanadium improves the overall mechanical properties of the ASTM A691 Grade 91 alloy steel pipe. The pipes are highly resistant to crevice and pitting corrosion.

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To compare costs, choose among the reputable ASTM a691 grade 91 alloy steel pipe suppliers in UAE and see how a691 grade 91 differs from 9 cr

The pipes are very versatile and available in various size ranges from 16 to 60 inches. There are several advanced and special value-added services available for these pipes which includes carburizing, recrystallization annealing, mechanical finishing, annealing, tempering, mechanical rough machining, polishing and grinding. They deliver outstanding performance due to their strong mechanical properties.

Specification of ASTM A691 Grade 91 Pipe


ASTM A691 Grade 91 Pipe Specification

ASTM A691 Grade 91 Pipe size Class designation OD
  • 16 to 60 inch
  • Class 11
  • Class 12
  • Class 22
  • Class 23
  • Class 30
  • 457 mm to 1422 mm
ASTM A691 Grade 91 EFW Steel Pipe Schedule Surface treatment Dimension Standard
  • Sch 5
  • Sch XXS
  • Sch 80
  • Sch 160
  • Sch 10
  • Sch 20
  • Sch 40
  • Painted
  • Galvanized
  • 3PE
  • Natural
  • FBE
  • Bare
  • Varnished
  • ANSI B36.19M
  • ANSI B36.10
End ASTM A691 grade 91 pipe standard Type
  • Plain End
  • Beveled Ends
  • JIS
  • ASTM
  • AISI
  • GB
  • SAE
  • DIN
  • AMS
  • EN
  • ASME
  • ASTM A691 grade 91 alloy EFW Steel Pipes
  • ASTM A691 gr 91 steel pipe
Form Length Manufacturing types
  • Round
  • Square
  • Rectangular
  • Single Random
  • Double Random
  • Cut length Pipe
  • Standard
  • EFW
Wall thickness Yield Strength Tensile Strength
  • 3 mm to 18 mm
  • 205 Mpa
  • 585 Mpa
ASTM A691 grade 91 Alloy Steel Pipes marking Testing methods Test Certificate
  • Grade
  • Length
  • Standard
  • Thickness
  • Heat No.
  • OD
  • Manufacturer/Supplier name
  • Hardness tests
  • Tensile Test
  • Ultrasonic Test
  • Hydrostatic pressure test
  • Charpy V-Notch Test
  • HIC Test
  • Manufacturer Test Certificate
  • Third Party Inspection
  • Laboratory Test Report from Government Certified Lab
  • MTC EN 1024 3.1/3.2
Value Added Services ASTM A691 Grade 91 EFW Steel Pipe cutting techniques Packing
  • Annealing
  • Mechanical rough machining
  • Carburizing
  • Mechanical finishing
  • Tempering
  • Recrystallization annealing
  • Polishing & grinding
  • Water-Jet
  • Tapping
  • Sawing
  • Bundles
  • Wodden box
  • Wrapped with polypropylene sheets
  • Pasltic bag

Do you have trouble locating ASTM A691 Grade 91 Alloy Steel EFW Pipes at Odd Sizes for High-Temperature Service? Contact a verified stockist in the Middle East and look up heat treatment

ASTM A691 Grade 91 Alloy Steel EFW Pipes heat treatment involves quenching and tempering is processed through flame heating or induction heating. This heat treatment process provides strong surface hardness and make the pipe highly resistant against stress corrosion cracking.

Locate the top ten importers of ASTM A691 Grade 91 EFW Steel Pipe in Dubai which offers quick delivery, cut-to-size, and testing services.

There are various Testing methods for ASTM A691 Grade 91 EFW Steel Pipe which includes:

  • Mechanical test
  • Destructive testing such as hardness and fracture test.
  • Non-destructive testing such as radiography, ultrasonic, hydrostatic and eddy current test.
  • Weld seam examination
  • Wall thickness assessment
  • Dimensional and visual inspection testing.

The above all industrial standard testing ensure the quality of the pipe by detecting any flaws and damage in the pipe and make sure the product is strictly adhering to the industrial standard requirements.

Purchase superb quality ASTM A691 Gr 91 pipe in bespoke sizes with MTC from traders, and view the temperature range.

ASTM A691 Gr 91 pipe exhibit excellent heat tolerance property and deliver superior performance in wide range of high temperature application with strong melting point of 6000C. The pipes are flexible and can withstand heavy loads.

A large assortment of hydrostatically certified ASME SA691 Gr.91 pipe is available at a discount; get in touch with us for a free sample to check applications

ASME SA691 Gr.91 pipe is very useful in the chemical and power plants as they can withstand high pressure conditions even in harsh environments with pressure range up to 4000 psi (270 bar). The pipes work efficiently even in low cryogenic applications with temperature range up to -280C.

ASME SA691 Gr.91 pipe chemical compositon and mechanical properties


ASTM A691 Grade 91 Pipe Properties