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A335 Alloy Steel P91 Pipe Manufacturer and Supplier.

ASTM A335 P91 Alloy Steel Pipe Supplier

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    A335 P91 Pipe Manufacturer, ASME SA335 Grade P91 Alloy Steel Seamless Pipes, Alloy Steel P91 Seamless Pipes, ASME SA335 High Pressure Alloy Pipes, Alloy Steel P91 Pipe Supplier, Alloy Steel Gr.P91 Pipes, ASME SA335 P91 Alloy Steel Seamless Pipes Supplier, Alloy Steel P91 Chrome Moly Pipe Manufacturer in Mumbai, India.

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    ASTM A335 P91 Alloy Steel pipes are seamless pipes commonly used in various industries. These pipes are made from a chromium-molybdenum alloy, featuring 1% molybdenum, 9% chromium, along with nickel, manganese, silicon, and carbon. This specific composition gives the A335 P91 pipe its high tensile and yield strength, along with excellent resistance to impact, corrosion, and oxidation.

    The production methods for ASTM A335 P91 Alloy Steel pipes include normalization and tempering or quenching and tempering, which enhance the material’s strength. These pipes are drawn and seamless, ensuring precision in dimensions, which is crucial for applications requiring high accuracy. The pipes’ ability to handle high temperatures and pressures makes them ideal for use in industries such as petrochemical, oil and gas, power generation, and refineries.

    SA 335 P91 Alloy Steel pipes come in various dimensions and shapes, with wall thicknesses ranging from 3 to 12 mm, depending on the pipe’s diameter and pressure class. Different schedules correspond to various pressure classes, making these pipes versatile for different applications. The ease of welding ASTM A335 P91 pipes allows them to be seamlessly integrated into piping systems, and they adhere to strict tolerance and testing standards based on their application requirements.

    ASTM A335 P91 Pipe Specification

    TypeSeamless / ERW / Welded / Fabricated
    StandardASTM A335 P91, SA335 P91 (with IBR Test Certificate)
    Size1/2” NB to 36” NB
    LengthStandard
    Double &
    In Cut length also.
    SchedulesSCH 40, SCH 80, SCH 160, SCH XS, SCH XXS, All Schedules
    ToleranceCold drawn pipe: +/-0.1mm
    Cold rolled pipe: +/-0.05mm
    ApplicationSeamless Ferritic Alloy-Steel Pipe for High-Temperature Service
    EndPlain End, Beveled End, Treaded
    CraftCold rolled and Cold drawn
    available in Form ofRound, Square, Rectangular, Hydraulic Etc.
    OriginEuropean, Japanese, Korean, US, Russian, Indian (Strictly No Chinese Material)
    Specialized inLarge Diameter ASTM A335 P91 Pipe
    Additional TestingNACE MR 0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, H2 SERVICE, IBR, etc.
    Thickness3-12mm 

    A335 Grade P91 Alloy Steel Pipe Chemical Compositions

    C, % Mn, % P, % S, % Si, % Cr, % Mo, % V, % N, % Ni, % Al, % Nb, %
    0.08-0.12 0.3-0.6 0.02 max 0.01 max 0.2-0.5 8.0-9.5 0.85-1.05 0.18-0.25 0.03-0.07 0.4 max 0.04 max 0.06-0.10

    Mechanical Properties of Alloy Steel P91 Seamless Pipes

    Tensile Strength , MPa Yield Strength, MPa Elongation, % Hardness, HB
    585 min 415 min 20 min 250 max

    SA335 P91 Alloy Steel Pipe Heat Treatment Requirements

     

    P5, P9, P11, and P22

     

     

    Grade

    Heat Treatment Type

    Normalizing Temperature Range F [C]

    Subcritical Annealing 
    or Tempering 
    Temperature Range F 

    [C]

    P5 (b,c)

    Full or Isothermal Anneal

     

     

    Normalize and Temper

    *****

    1250 [675]

     

    Subcritical Anneal (P5c only)

    *****

    1325 – 1375 [715 – 745]

    P9

    Full or Isothermal Anneal

     

     

    Normalize and Temper

    *****

    1250 [675]

    P11

    Full or Isothermal Anneal

     

     

    Normalize and Temper

    *****

    1200 [650]

    P22

    Full or Isothermal Anneal

     

     

    Normalize and Temper

    *****

    1250 [675]

    P91

    Normalize and Temper

    1900-1975 [1040 – 1080]

    1350-1470 [730 – 800]

     

    Quench and Temper

    1900-1975 [1040 – 1080]

    1350-1470 [730 – 800]

    SA335 P91 Pipe Tensile Requirements

     

    Seamless

     

    P-5

    P-9

    P-11

    P-22

    P-91

    P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].

    Tensile   Strength, min.,   psi

    ksi

    60

    60

    60

    60

    85

    MPa

    415

    415

    415

    415

    585

     

    Yield Strength,   min., psi

     

    ksi

    30

    30

    30

    30

    60

     

    MPa

    205

    205

    205

    205

    415

     

    Alloy Steel P91 Alloy Steel Pipe Wall Thickness

    NPS [DN] Designator Tolerance, % from Specified
    Over Under
    1/8 to 2 1/2 [6 to 65] incl., all t/D ratios 20.0% 12.5%
    Above 2 1/2  [65], t/D < or = 5% 22.5% 12.5%
    Above 2 1/2  [65], t/D > 5% 15.0% 12.5%
    (t = Specified Wall Thickness; D = Specified Outside   Diameter)

    Supply and Exporter

    Taiwan, Mexico, Iran, Namibia, Afghanistan, Netherlands, Nepal, Ireland, Libya, Morocco, Iran, Switzerland, Finland, Slovakia, Pakistan, Australia, Serbia, Angola, China, Philippines, Czech Republic, Belgium, Estonia, Costa Rica, Croatia, Sweden, Venezuela, Colombia, India, Belarus, Jordan, Azerbaijan, Mongolia, Vietnam, Ghana, Iraq, Algeria, Puerto Rico, New Zealand, Singapore, Indonesia, Ukraine, Israel, Mexico, Hong Kong, Bhutan, Germany, Brazil, Plan, Yemen, Malasiya, USA, Cambodia, Laos, Uganda, Tanzania, Sudan, Democratic Republic of Congo, zambia, Ethiopia, Brunei, Madagascar, Niger, Mali, Bangladesh, Bolivia, United States, Ecuador, Lebanon, Italy, South Korea, Denmark, Norway, Sri Lanka, Zimbabwe, Japan, Yemen, Oman, Portugal, Lithuania, Canada, Macau, Bahrain, Austria, Bulgaria, Spain, Kenya, United Kingdom, United Arab Emirates, Kazakhstan, Egypt, Saudi Arabia, Gambia, Argentina, Romania, Tibet, France, Chile, Gabon, South Africa, Trinidad & Tobago,Tunisia, Turkey, Nigeria, Peru, Russia, Chile, Nigeria, Hungary, Qatar, Greece, Malaysia, Kuwait, Poland, Thailand, Poland,Germany, Belgium, Italy, Turkey, Denmark and UK.

    FAQs

    P91 pipe material is a chrome-moly alloy steel known for its excellent strength and temperature resistance. It is classified as a creep strength enhanced ferritic (CSEF) material. P91 is processed by normalizing at 1050°C, air cooling to 200°C, and then tempering at 760°C.
    P91 steel is equivalent to standards like GOST 550-75, ASTM A213, E9015-B9, ASME SA213, EN 10216-2, and NBR 5603. It is processed by normalizing at 1050°C, air cooling to 200°C, and then tempering at 760°C.

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