Why Refineries Choose Ganpat Industrial Corporation For ASTM A335 P91 Pipe ?
IBR Form III On Every Lot
SA335 P91 High Pressure Pipe cleared for Indian Boiler Regulation use
Quote In 24 Hours
Share your NPS, schedule and length list before 6 PM IST for next-morning pricing
FBE & 3LPE On Rack
Coated and bare UNS K91560 Seamless Pipe held in Mumbai stock
Heat-Traceable Chrome Moly
Every length carries a heat number back to the EN 10204 3.1 mill test certificate
Same-Week Dispatch
Rack schedules leave Mumbai within 5 working days of PO release
ASTM A335 P91 Pipe Technical Data
- 1Material Basis: ASTM A335 Grade P91 Alloy Steel Seamless Pipe • UNS K91560 • ASME A335 P91 Pipe, 9Cr-1Mo-V ferritic-martensitic chemistry
- 2Governing Standards: ASTM A335 / ASME SA335 Gr P91 • ASTM A213 / A213M for tube form • EN 10216-2 X10CrMoVNb9-1
- 3Size Range: 1/2″ NB to 24″ NB • Larger diameters on request • SCH 40 to SCH XXS
- 4Form: UNS K91560 Seamless Pipe, Type 1 & Type 2 chemistry • Round, Alloy P91 ASTM A335 Round Pipe
- 5Equivalents: DIN / EN 1.4903, X10CrMoVNb9-1 • NBR 5603 • GOST 550-75 comparable heat class
- 6Coating: FBE & 3LPE Coating, bare, oiled or mill varnish finish supplied ex-Mumbai
Mumbai works desk • WhatsApp +91 85912 64209 • IBR Form III issued on request
Ganpat Industrial Corporation stocks and supplies ASTM A335 P91 Pipe from our Mumbai works. We have served industrial buyers from this location since 1997. ASME SA335 Gr P91 Seamless Pipe carries 9% chromium and 1% molybdenum chemistry. Fossil and combined-cycle power plants lean on this for main steam lines. ASTM A335 Grade P91 Alloy Steel Seamless Pipe leaves our stockyard ready for use. It suits superheater headers, reheater piping, and refinery process lines. Every length is cut and tested against Alloy Steel ASTM A335 P91 Pipe requirements. UNS K91560 heat traceability is carried through to the mill test certificate. SA335 P91 Cold Drawn Pipe is held on rack in common NB sizes. ASME A335 P91 Hot Finished Pipe is also stocked in these NB sizes. Buyers also know this material as Steel Grade P91 Chrome Pipe. Older enquiries specify it as Alloy Steel SA 335 P91 High Pressure Pipe. We ship Low Alloy ASTM A335 P91 Chrome Moly Pipe from Mumbai. Low Alloy ASTM A335 P91 Chrome Pipe cut lengths reach Vadodara, Kandla, and Chennai. We export Alloy P91 ASTM A335 High Pressure Pipe to Dubai and Dammam. These exports also extend to Rotterdam and Singapore.
Mumbai · IBR Certified Chrome-Moly Pipe Stockist & Exporter
ASTM A335 P91 Pipe Built For Main Steam Lines That Cannot Afford A Second Chance
Ganpat Industrial is a trusted ASTM A335 P91 Pipe Supplier in India dispatching IBR Certified SA335 P91 High Pressure Pipe from Mumbai. We stock UNS K91560 Seamless Pipe with EN 10204 3.1 / 3.2 certification, FBE & 3LPE Coating for petrochemical refineries.
- ✓ISO 9001:2015
- ✓ISO 14001:2015
- ✓OHSAS 18001:2007
- ✓PED Certified
- ✓Petrofac Approved
IBR Certified SA335 P91 High Pressure Pipe Supplier in India, Refer Dimensions
Specification Of ASTM A335 P91 Pipe
Order Sheet In One Glance
Everything a buyer normally has to email us for, listed before you pick up the phone.
ASTM A335 P91 Pipe Material Basis
- ASTM A335 Grade P91 Alloy Steel Seamless Pipe
- ASME SA335 Gr P91 Seamless Pipe
- Alloy P91 ASTM A335 Seamless Pipe
- UNS K91560 High Pressure Pipe
Governing Pipe Standards
- ASTM A335 / ASME A335 P91 Pipe
- ASTM A213 (tube form)
- EN 10216-2 X10CrMoVNb9-1
- NBR 5603 P91 Seamless Pipe
ASTM A335 P91 Pipe Size Range
- 1/2″ NB – 24″ NB
- Above 24″ NB On Request
- Wall Thickness: SCH 40 – SCH XXS
- UNS K91560 Round Pipe
ASTM A335 P91 Pipe Form & Route
- UNS K91560 Seamless Pipe Only
- Alloy P91 ASTM A335 Round Pipe
- SA335 P91 Hot Rolled Pipe
- SA335 P91 Cold Drawn Pipe
ASTM A335 P91 Pipe Delivery Condition
- Normalized & Tempered (N+T)
- Quenched & Tempered (Q+T)
- Hardness ≤ 250 HB As Supplied
- PWHT On Repair Welds
ASME A335 P91 Production Route
- Hot Piercing / Hot Rolling
- ASME A335 P91 Hot Finished Pipe
- Cold Drawn Finishing
- Straightening & Sizing
ASTM A335 P91 Pipe Alloy P91 ASTM A335 Round Pipe Testing Offered
- Hardness (HB / HV / HRC)
- PMI Spectro Analysis
- Hydrostatic & Ultrasonic NDT
- Third Party Inspection
P91 Fittings Range
- ASTM A234 WP91 Fittings
- ASTM A182 F91 Flanges
- P91 Elbow, Tee & Reducer
- Matching Buttweld Fittings
Coating & Packing
- FBE & 3LPE Coating
- Bare / Oiled / Mill Varnish
- End Caps On Every Length
- Fumigated Wooden Crates
ASME SA335 Gr P91 Seamless Pipe Size Chart
| NB Size | OD (mm) | SCH 40 WT | SCH 80 WT | SCH XXS WT |
|---|---|---|---|---|
| 1/2″ | 21.34 | 2.77 | 3.73 | 7.47 |
| 1″ | 33.40 | 3.38 | 4.55 | 9.09 |
| 2″ | 60.33 | 3.91 | 5.54 | 11.07 |
| 3″ | 88.90 | 5.49 | 7.62 | 15.24 |
| 4″ | 114.30 | 6.02 | 8.56 | 17.12 |
| 6″ | 168.30 | 7.11 | 10.97 | 21.95 |
| 8″ | 219.10 | 8.18 | 12.70 | 22.23 |
| 12″ | 323.90 | 10.31 | 17.48 | 25.40 |
| 16″ | 406.40 | 12.70 | 21.44 | — |
| 24″ | 609.60 | 17.48 | 24.61 | — |
Types Of ASTM A335 P91 Pipe We Supply
As a leading stockist of Alloy Steel ASTM A335 P91 Pipe, we hold both product types and common finishes.
ASTM A335 P91 Seamless Pipe
Type 1
UNS K91560 Seamless Pipe
Type 2
SA335 P91 Cold Drawn Pipe
Cold Finished
SA335 P91 Hot Rolled Pipe
Hot Finished
ASME A335 P91 Hot Finished Pipe
Hot Finished
Alloy P91 ASTM A335 Round Pipe
Standard
Low Alloy ASTM A335 P91 IBR Pipe
IBR Cleared
NBR 5603 P91 Seamless Pipe
Export Grade
Need SA335 P91 High Pressure Pipe In A Hurry?Mail the NPS, schedule and length – we quote UNS K91560 Seamless Pipe for petrochemical refineries the same day.
Alloy P91 ASTM A335 Round Pipe Chemical Composition
Chemical Composition of UNS K91560 Chrome Pipe held tight against ASTM A335 Grade P91 heat analysis limits on every cast.
IronFe
Balance
ChromiumCr
8.00 – 9.50%
MolybdenumMo
0.85 – 1.05%
ManganeseMn
0.30 – 0.60%
CarbonC
0.08 – 0.12%
SiliconSi
0.20 – 0.50%
VanadiumV
0.18 – 0.25%
NiobiumNb
0.06 – 0.10%
NitrogenN
0.030 – 0.070%
NickelNi
0.40% max
AluminiumAl
0.04% max
SulphurS
0.010% max
PhosphorusP
0.020% max
SA335 P91 Cold Drawn Pipe Mechanical Properties
The Numbers Your Inspector Will Ask For
Baseline mechanical values for Alloy Steel ASTM A335 P91 Pipe in the normalized and tempered condition.
Tensile Strength Min
585 MPa
85 ksi
Yield Strength Min
415 MPa
60 ksi
Elongation Min
20%
In 2 in / 50 mm
Brinell Hardness Max
250 HB
25 HRC / 265 HV Max
Test Bar Orientation
Longitudinal / Transverse
Per ASTM A370 test methods, one bar per lot
Hardness Method
HB / HV / HRC
Reported on the mill test certificate, lot wise
Design Temperature
Up To 600 – 625°C
Typical superheater / reheater service window
Heat Treated Condition
Normalized + Tempered
Quench & temper permitted above 3 in. wall
Physical Properties Of NBR 5603 P91 Seamless Pipe
Density (Typical)
~7.75 g/cm³
Not specified in ASTM A335; typical for 9Cr-1Mo-V steel
Thermal Conductivity
Higher Than Austenitic SS
Favourable for thick-wall header design
Thermal Expansion
Lower Than Austenitic SS
Reduces thermal-fatigue risk in cyclic service
Structure
Tempered Martensite
Achieved via normalize + temper cycle
ASTM A335 P91 Pipe Equivalent Grades
One Chemistry, Many Nameplates
Equivalent Grades of ASTM A335 Gr P91 Round Pipe read on different national standards, same 9Cr-1Mo-V base.
ASTM / ASME
- ASTM A335 Grade P91
- ASME SA335 Gr P91
- UNS K91560
DIN / Werkstoff / EN
- DIN / EN 1.4903
- EN 10216-2 X10CrMoVNb9-1
- Tube form: ASTM A213 T91
South American / GOST
- NBR 5603 P91 Seamless Pipe
- NBR 5603 P91 Hot Finished Pipe & NBR 5603 P91 Cold Drawn Pipe cross-referenced
- GOST 550-75 (comparable class)
Nearby ASTM A335 Grades
- ASTM A335 P92 (W-alloyed, higher creep)
- ASTM A335 P22 (2.25Cr-1Mo)
- ASTM A335 P9 (9Cr, no V/Nb)
Fittings & Forging Family
- ASTM A182 Grade F91 (forgings, flanges)
- ASTM A234 Grade WP91 (fittings)
- ASTM A387 Grade 91 (plate)
Indian Market Note
- No single-number IS equivalent
- Ordered as ASTM A335 P91 directly
- IBR Form III issued alongside MTC
What Are The Two Types Of ASTM A335 P91 Pipe?
An ASTM A335 P91 Pipe Manufacturer in India offers both chemistry types under the same specification.
Type 1 Pipe
- Standard Nb, N and Al control band
- Widest global mill availability
- Default type unless PO specifies otherwise
- Same tensile, yield and hardness limits
- Preferred for general power & refinery piping
Type 2 Pipe
- Tighter residual element control
- Called out for critical nuclear-adjacent duty
- Slightly narrower Al and N band
- Same tensile, yield and hardness limits
- Ordered against specific project specification
Monthly Delivery of ASTM A335 P91 Pipe to Below Countries
| Export to | Continent | Shipping time |
|---|---|---|
 Mexico |
North America | 45 Days |
 South Africa |
Africa | 25-30 Days |
 Oman |
Asia | 5 Days |
 Kenya |
Africa | 19 Days |
ASME A335 P91 Hot Finished Pipe Manufacturing & Heat Treatment
From Billet To Finished Length
A quick look at how Alloy Steel ASTM A335 P91 Pipe becomes a finished length leaving our works.
Hot Piercing
Billet pierced and rolled seamless, hot finished or cold drawn
Normalize
Heated to 1040 – 1080°C minimum and air cooled
Temper
Held at 730 – 800°C to relieve martensite hardness
Inspection
Chemistry, hardness, dimensional and NDT cleared
Dispatch
Bundled, tagged and shipped with MTC & IBR Form III
Alloy Steel ASTM A335 P91 Pipe Welding
Chrome-Moly Needs A Documented Procedure
ASTM A335 P91 Pipe is air-hardening and cold-crack sensitive; every weld follows a qualified WPS.
Root Pass
GTAW, ER90S-B9
Controlled heat input, cleanest root
Fill / Cap Pass
SMAW, E9015-B9
Basic low-hydrogen electrode
Preheat
200 – 300°C
Maintained through welding, interpass below 300°C
PWHT
750 – 770°C
Mandatory above 13 mm wall per ASME B31.3
Buy UNS K91560 Seamless Pipe in FBE & 3LPE Coating for Petrochemical Refineries at Factory Prices
Application Of Low Alloy ASTM A335 P91 Chrome Pipe
Where This High Pressure Pipe Goes To Work
Anywhere strength has to travel with heat, ASTM A335 Grade P91 Alloy Steel Seamless Pipe earns its place on the BOM.
Power Plant Main Steam Lines
Superheater & Reheater Headers
Petrochemical Refinery Process Lines
Subcritical & Supercritical Boilers
High Pressure Steam Piping
Hydrogen & Sulphidation Service Units
Nozzle Seats & Steam Chambers
Combined-Cycle & Waste Heat Boilers
ASTM A335 P91 Pipe vs ASTM A335 P92 Pipe
ASTM A335 P91 Pipe
- Cr 8.00 – 9.50%, Mo 0.85 – 1.05%
- No tungsten addition
- Design temperature up to ~600°C
- Wider global mill availability, lower cost
ASTM A335 P92 Pipe
- Cr ~8.5 – 9.5%, Mo ~0.30 – 0.60%
- Tungsten (W) added for higher creep strength
- Design temperature up to ~625°C+
- Preferred for ultra-supercritical boiler duty
Steel Grade P91 Chrome Pipe Weight Chart
| NPS | OD (mm) | SCH 40 WT (mm) | Wt/M SCH 40 (kg) | SCH 80 WT (mm) | Wt/M SCH 80 (kg) |
|---|---|---|---|---|---|
| 1/2 | 21.34 | 2.77 | 1.27 | 3.73 | 1.62 |
| 1 | 33.40 | 3.38 | 2.50 | 4.55 | 3.23 |
| 2 | 60.33 | 3.91 | 5.44 | 5.54 | 7.48 |
| 3 | 88.90 | 5.49 | 11.29 | 7.62 | 15.27 |
| 4 | 114.30 | 6.02 | 16.07 | 8.56 | 22.32 |
| 6 | 168.30 | 7.11 | 28.26 | 10.97 | 42.55 |
Weekly Delivery Of ASTM A335 P91 Pipe To Below Countries
| Export To | Countries | Continent | Shipping Time | Ports |
|---|---|---|---|---|
|
United Arab Emirates | Asia | 8 Days | Jebel Ali Port |
|
Saudi Arabia | Asia | 10 Days | Dammam Port |
|
Brazil | South America | 32 Days | Port of Santos |
Alloy P91 ASTM A335 Round Pipe Testing Offered
An experienced ASTM A335 P91 Pipe Supplier in India delivers material for critical high-temperature projects.
Hardness Test
HB / HV / HRC readings recorded lot wise, capped at 250 HB
Chemical / PMI Analysis
Spectro reading against UNS K91560 composition limits
Dimensional Inspection
OD, WT and length checked against ASTM A335 limits
Hydrostatic & NDT
Pressure test and ultrasonic examination on every length
Heat Treatment Record
Normalize and temper cycle logged per heat
Third Party Inspection
SGS, BV, TUV or Lloyd’s arranged before dispatch
Alloy P91 ASTM A335 Seamless Pipe IBR & Documentation
Chemical Analysis Report
Spectro reading against ASTM A335 P91 composition limits
Every Order
Mechanical Test Report
Tensile, yield, elongation and hardness recorded lot wise
Every Order
Dimensional Inspection Sheet
OD, WT and length checked against ASTM A335 limits
Every Order
IBR Form III
Indian Boiler Regulation clearance for high pressure duty
On Request
Certificate Of Origin
Chamber attested for customs clearance abroad
Export Orders
Packing List & Invoice
Length count, net and gross weight, HSN and GST
Every Order
ASTM A335 P91 Pipe Frequently Asked Questions
What is ASTM A335 material?
US standard for seamless ferritic alloy steel pipe used in high-temperature service.
What is P91 material?
A 9% chromium, 1% molybdenum steel with high creep strength up to 600°C.
What is the hardness range of P91 material?
Maximum 250 HB as-supplied; as-welded hardness before PWHT can exceed 400 HV.
What is the welding procedure for P91 material?
Preheat 200-300°C, GTAW root, SMAW fill, then mandatory PWHT at 750-770°C.
What is the difference between P91 and P92 pipe?
P92 adds tungsten for higher creep strength; P91 suits main steam up to 600°C.
We Collaborate With Traders in the Following Locations
| Regions | Country |
|---|---|
| Gulf Coast | USA |
| North America | USA, Canada, Mexico |
| South America | Brazil, Argentina, Colombia |
| North Africa | Egypt, Morocco, Algeria |
| West Africa | Nigeria, Ghana, Senegal |
| East Africa | Kenya, Ethiopia, Tanzania |
| Middle East | Saudi Arabia, Iran, Iraq |
| South Asia | India, Pakistan, Bangladesh |
| East Asia | China, Japan, South Korea |
| Melanesia | Fiji, Papua New Guinea |
6 Reasons to choose Ganpat Industrial Corporation
- Distributor of Heat Exchanger parts and Alloys for High Temperature applications.
- Stockholder and importer of Ferrous and non ferrous metals.
- Wide stock of prime quality austenitic and Ferritic Stainless Steel for Extreme pressure environment.
- Marine grade steel at lowest price in Mumbai.
- Compare Price per KG in India and China.
- Offer Resale price to local suppliers, traders and wholesalers in UAE, Saudi Arabia, Egypt, and USA