
ASTM A335 Alloy Steel Seamless Pipes ASTM A335 GR P5 | GR P9 | GR P11 | GR P22 | GR P91. Alloy Steel Seamless Pipes (IBR APPROVED & NACE APPROVED) ASTM A335 PIPES | ASTM A335 GR P5 PIPES | ASTM A335 GR P9 PIPES | ASTM A335 GR P11 PIPES | ASTM A335 GR P22 PIPES | ASTM A335 GR P91 PIPES Size Range: 1/8" - 26" | ![]() |
Alloy Steel Seamless Pipes (ASME SA335 Grade P5)
Alloy Steel Seamless Pipes (ASME SA335 Grade P5) offered by us are
made available in ASME SA335 as well as P1, P5, P9, P11, P12, P91
grades. Our expertise lies in offering these in different sizes
& schedules, with IBR & latest edition NACE MR 0175
reports.
ASME Alloy Steel Seamless Tubes / Pipes (SA335 Grade P9)
ASME Alloy Steel Seamless Tubes / Pipes (SA335 Grade P9)
manufactured, supplied and exported by us are used for various
industrial applications. Our specialization in offering precision
engineered alloy steels allow us to deliver these for various
engineering applications in various grades like A-387 GR. P1, P5,
P9, P11, P12, P22, P91, ASTM A-335 and others.
Alloy Steel Pipes (ASTM A335 P11)
Alloy Steel Pipes (ASTM A335 P11) 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.
Alloy Steel Pipes (ASTM A335 P12)
Alloy Steel Pipes (ASTM A335 P12) offered by us are available with
ASTM A335 P12 standard and finds application in industries like
Petrochemicals, Refineries, Fertilizers, Pharmaceuticals and
others. We can source these seamless pipes in size range of up to
26 inches.
Alloy Seamless Pipes (ASTM A335 Grade P91 NACE)
Alloy Seamless Pipes (ASTM A335 Grade P91 NACE) offered by us are
made available in ASTM A335 Grades. Made as per IBR standards,
these are mainly used in boiler operations. Further, our expertise
lies in offering these pipes in various size range as well as in
customized parameters as per boiler piping requirements. Sourced
from quality conscious manufacturers, we also offer our clients the
option of adding their own mark on them.
Alloy Steel Tubes (ASME SA213 Grade T11)
Alloy Steel Tubes (ASME SA213 Grade T11) manufactured and supplied
by us are of ASME SA213 Grade. Our expertise lies in offering these
in various sizes as well as other specifications as per the
required demands. These Alloy Steel Tubes find usage mainly in
different industrial applications.
Heat Treatement Requirement
P5, P9, P11, and P22 | ||||
Grade | Heat Treatment Type | Normalizing Temperature Range F [C] | Subcritical Annealing | |
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] |
Chemical Requirements
Grade | P-5 | P-9 | P-11 | P-22 | P-91 | P-91 shall also include the following: | ||
Element | UNS Designation | K41545 | S50400 | K11597 | K21590 | K91560 | ||
Carbon | 0.15 max | 0.15 max | 0.05 - 0.15 | 0.05 - 0.15 | 0.08 - 0.12 | V at 0.18 - 0.25 | ||
Manganese | 0.30 - 0.60 | 0.30 - 0.60 | 0.30 - 0.60 | 0.30 - 0.60 | 0.30 - 0.60 | N at 0.030 - 0.070 | ||
Phosphorous, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.020 | Ni at 0.40 max | ||
Sulfur, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.010 | Al at 0.02 max | ||
Silicon | 0.50 max | 0.25 - 1.00 | 0.50 - 1.00 | 0.50 max | 0.20 -0.50 | Cb at 0.06 - 0.10 | ||
Chromium | 4.00 - 6.00 | 8.00 - 10.00 | 1.00 - 1.50 | 1.90 - 2.60 | 8.00 - 9.50 | Ti at 0.01 max | ||
Molybdenum | 0.45 -0.65 | 0.90 - 1.10 | 0.44 - 0.65 | 0.87 - 1.13 | 0.85 - 1.05 | Zr at 0.01 max |
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 |
ermissible Variation in 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) |
Elongation Requirements
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 Outside Diameter at any point shall not vary from standard specified more than: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Mechanical Tests Specified | |
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. |
TOBO STEEL GROUP CHINA
TOBO GROUP sales head offce in Shanghai.
We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area of 6,8,000square meters, existing 260 workers and 45 technicians.
We have five branch factories which can supply the best quality pipes, tubes, fittings flanges and related accessories. Now, it owns a number of advanced pipe production equipments, metal, forging, machining, cold forming, hot extrusion, such as heat treatment process, producing 60, 000 tons of pipe fittings. Company with a variety of detection devices, such as nondestructive testing, chemical analysis, metallographic examination, physical experiments. The technical is very strength, our main products contain fittingsforged socket welding fittings and threaded fittings, pipe weld and the materials of the products contain stainless steel ,duplex-stainless steel alloy steel.
In addition, we are authorized by more than 120 top-class mills from South Korea,Japan and China like JFE,SUMITOMO,POSCO,BAOSTEEL, TISCO,LISCO,.TPCO,HENGYANG VALIN and so on .
Our main products as follows:
(seamless pipe / welded pipe / square pipe / rectangular tube,duplex stainless / inconel tube)
(seamless pipe / ERW / SSAW / LSAW / UOE / hollow section pipe / Galvanized Pipe)
(line pipe,water pipeline,gas pipeline,oil pipeline)
(copper tube/titanium tube/aluminium tube/nickel alloy )
(round bar/angle steel /flat steel/channel steel/steel wire)
(eblows, equal / reducing tees, concentric/eccentric reducers, caps, crosses, bends, dish end/end cup, stub ends, unions, couplings / hex couplings, swage nipples , nipples, hex. plug, sockolet, weldolet, thredolet, etc)
(DIN flange/ AISI flange/blind flange/welding flange/stainless flange/slip on flange)
(stainless steel/carbon steel/alloy steel/galvanized steel/aluminium )
(ball valve/gate valve/butterfly valve/globe valve/swing check valve/ check valve)
In order to comply with the global modernization services development trends and eliminating the varieties distress of the global enterprise‘s purchase in the consumables.. We coordinate the pressure pipe manufacturer which with the scale of production,quality control and high cost performance (has passed ISO 9001 quality series attestation, ccs, DNV,PED/97/23/EC,AD2000-WO,special equipment manufacturing license,ASME-SA182.through a variety of effective assort mechanism to make up the shortage of supply and Post-processing of VAT enterprise, and to supply high quality pipe fittings, because of the superior quality and good service, we have established long term business cooperation with more than 60 countries and areas,which covers Europe, Africa, South America, North America, Middle East, Taiwan and South East Asia and so on.
With many years effort and support from our valuable customers, these products have obtained a big market share in the world.
Our business principle is "Superior quality,
Competitive price, Timely delivery and Considerate service "
Standing to the principle of “Enterprises focus on the core
business”, TOBO will actively promotes the globalization of
business strategy approach, using advanced supply chain
management technology to service for clients with higher quality
and more competitiveness ‘ s products. At the same time, we
sincerely reply your inquiry, honesty waiting for your visiting and
wish to have cooperation with you at the any time. We welcome
all the customers to contact us for more information. We assure
you, with our technical knowledge and experience, our
company will be one of your Stable, Continuate business parters in
China.
info@tobo-group.com