| Customization: | Available |
|---|---|
| Type: | Seamless |
| Technique: | Cold Drawn |
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Prosaic Steel Supply stocks a full range of the following A335 pipe grades:
ASTM A335 Pipe (ASME S/A335, Chorme-Moly) is a seamless ferritic Alloy-Steel Pipe for high temperature service. Pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Sometimes referred to as "P Grade", chome moly pipe is popular in P-Grades P5, P9, P11, P22, and P91. The most common use of grades P11, P22, and P91 is in the power industry and petro-chemical plants, Grades P5 and P9 are commonly used in refineries
A335 is often called chrome moly pipe because of the chemical makeup of Molybdenum (Mo) and Chromium (Cr). Molybdenum increases the strength of steel as well as the elastic limit, resistance to wear, impact qualities, and hardenability. Moly increases the resistance to softening, restrains grain growth and makes chromium steel less susceptible to embrittlement. Moly is the most effective single additive that increases high temperature creep strength. It also enhances the corrosion resistance of steel, and inhibits pitting. Chromium (or chrome) is the essential constituent of stainless steel. Any steel with 12% or more Chrome is considered stainless. Chrome is virtually irreplaceable in resisting oxidation at elevated temperatures. Chrome raises the tensile, yield, and hardness at room temperatures. The composition chrome moly alloy steel pipe make it ideal for use in power plants, refineries, petro chemical plants, and oil field services where fluids and gases are transported at extremely high temperatures and pressures.
Alloy Steel Pipes (ASTM A335 P22)
ASTM A335 P22 Pipe offered by us are made as per IBR standards and are used mainly for boiler operations. We source these seamless pipes in varied size range. Further, we can also get these customized as per boiler piping requirements. For ensuring in them optimum quality standards, we source these from quality manufacturers. We also offer clients of having their own mark on them.
ASTM A335 P22 Pipe Chemical Composition
Chemical composition % of A335 P22 Alloy Steel Seamless Pipe
| Compositions | Data |
| UNS Designa-tion | K21590 |
| Carbon | 0.05-0.15 |
| Manganese | 0.30-0.60 |
| Phosphorus(max.) | 0.025 |
| Sulfur(max.) | 0.025 |
| Silicon | 0.50-1.00 |
| Nickel | … |
| Chromium | 1.90-2.60 |
| Molybdenum | 0.87-1.13 |
| Other Elements | … |
Mechanical Properties of ASTM A335 P22 Pipe
| Tensile Strength, MPa | Yield Strength, MPa | Elongation, % |
| 415 min | 205 min | 30 min |
Heat Treatment Requirements of ASTM A335 P22 Pipes
| 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] |
Mechanical Properties of ASTM A335 P22 Pipe
| Tensile Strength, MPa | Yield Strength, MPa | Elongation, % |
| 415 min | 205 min | 30 min |
Heat Treatment Requirements of ASTM A335 P22 Pipes
| 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] |
Permissible Variation in Wall Thickness of ASTM A335 P22 Pipes
| 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) |
Elongation Requirements of ASTM A335 P22 Pipes
| Calculated Minimum Elongation Values | |||||
| Elongation in 2 in. or 50 mm, min % | |||||
| Wall Thickness | P5, P9, P11, P22 | P91 | |||
| in. | mm | Longitudinal | Transverse | Longitudinal | |
| 5/16 (0.312) | 8 | 30 | 20 | 20 | |
| 9/32 (0.281) | 7.2 | 28 | 19 | 19 | |
| 1/4 (0.250) | 6.4 | 27 | 18 | 18 | |
| 7/32 (0.219) | 5.6 | 26 | 17 | ||
| 3/16 (0.188) | 4.8 | 24 | 16 | ||
| 5/32 (0.156) | 4 | 22 | 15 | ||
| 7/8 (0.125) | 3.2 | 21 | 14 | ||
| 3/32 (0.094) | 2.4 | 20 | 13 | ||
| 1/18 (0.062) | 1.6 | 18 | 12 |
Permissible Variations in Outside Diameter of ASTM A335 P22 Pipes
Outside Diameter at any point shall not vary from standard specified more than:
| NPS [DN] Designator | Over | Under | ||
| in. | mm | in. | mm | |
| 1/8 to 1 1/2 [6 to 40], incl. | 1/64 (0.015) | 0.40 | 1/64 (0.015) | 0.40 |
| Over 1 1/2 to 4 [40 to 100], incl. | 1/32 (0.031) | 0.79 | 1/32 (0.031) | 0.79 |
| Over 4 to 8 [100 to 200], incl. | 1/16 (0.062) | 1.59 | 1/32 (0.031) | 0.79 |
| Over 8 to 12 [200 to 300], incl. | 3/32 (0.093) | 2.38 | 1/32 (0.031) | 0.79 |
| Over 12 [300] | +/- 1% of the specified outside diameter |
Mechanical Tests Specified for ASTM A335 P22 Pipes
| Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test | |
| For material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot. For small lots, at least one pipe shall be tested. | |
| For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipe. | |
| Notes for Hardness Test: | P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC]. |
| Notes for Bend Test: | For pipe whose diameter exceeds NPS 25 and whose diameter to wall thickness ratio is 7.0 or less shall be subjected to the bend test instead of the flattening test. |
| Other pipe whose diameter equals or exceeds NPS 10 may be given the bend test in place of the flattening test subject to the approval of the purchaser. | |
| The bend test specimens shall be bent at room temperature through 180 without cracking on the outside of the bent portion. | |
| The inside diameter of the bend shall be 1 inch [25 mm]. | |
| Hydrostatic Test | Each length of pipe shall be Hydro tested, at option of manufacture nondestructive electric testing can be used. |
A335 Gade P22 Pipes Required Markings on Each Length
(On Tags attached to each Bundle in case of Bundled Pipe) Markings will adhere to prescribed specifications in A 999/A999M and be: Rolled, Stamped, or Stenciled (Mfrs. Option)
| In addition, markings will include: | ||
| Length of Pipe | Marking to indicate the test method(s)HydrostaticNondestructiveMarkingYESNOTest PressureNOYESNDENONONHYESYESTest Pressure/NDE | |
| Schedule Number | ||
| Heat Number or Manufacturer's number by which heat can be identified | ||
| An Additional Symbol "S" if the pipe conforms to any Supplementary Requirements | ||
| S1 - Product Analysis | ||
| S2 - Transverse Tension Test | ||
| S3 - Flattening Test | ||
| S4 - Metal Structure and Etching Tests | ||
| S5 - Photomicrographs | ||
| S6 - Photomicrographs for Individual Pieces | ||
| S7 - Alternative Heat Treatment - Grade P91 | ||
| Pipe that has been weld repaired shall be marked "WR". |
ASTM A335 P22 Pipes Reference Documents
ASTM A335 P22 Pipes Ordering Information
Orders for material under this specification should include the following, as required, to describe the desired material adequately:
| Quantity | Feet, meters, or number of lengths |
| Name of material | Seamless Alloy Steel Pipe |
| Grade | P5, P9, P11, P22, P91 |
| Manufacturer | Hot-finished or cold-drawn |
| Size using one of the following: | |
| NPS and Schedule Number | |
| Outside Diameter and Nominal Wall Thickness | |
| Outside Diameter and Minimum Wall Thickness | |
| Inside Diameter and Nominal Wall Thickness | |
| Inside Diameter and Minimum Wall Thickness | |
| Length | Specific or Random |
| End Finish |
A335 P22 Pipe Packing
A335 Grade P22 Pipe is sleeved into plastic bag individually, pieces wrapped with water-proof material, bundled with nylon rope. Clear labels are tagged on the outside of the package for easy identification of the quantity and product I.D. Great care is taken during operation and transportation.
A335 Grade P22 Pipe packing will be according to international standard in bundles strapped by strips then into containers to avoid any damage.
Special Features:
HONGCHENG LIMITED CHINA have exported Alloy Steel Pipe , ASTM A333 p11 pipes to over 60 countries including Sudan,UAE, UK, Iran, Iraq, Qatar, Bahrain, Oman, Yemen, Lebanon, Jordan, Saudi Arabia, Malaysia, Indonesia, Singapore, Australia, New Zealand, USA, Canada, Mexico, Brazi, Netherlands, Germany, Italy, Spain, Serbia, Kuwait, Peru, Nigeria, Poland, South Africa, Denmark, Turkey, Egypt, Venezuela, Kuwait, Madagascar, Angloa & Srilanka. we stock reputation factory material from chengde, baosteel, vallourec tianda, kanghong, hengyang valin ,JFE etc,the stock list update weekly.
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