ASTM A335 P22 Alloy Steel Pipes Manufacturer in India

ASTM A335 P22 Alloy Steel Pipes Specifications

ASTM A335 P22 Alloy Steel Pipes Standards

Each lot is proven by chemical analysis, tensile and flattening tests, and a hydrostatic or non-destructive check as the code requires. Positive material identification then confirms the chromium and molybdenum on the pipe itself. A third-party inspector is welcome at our works if your project asks for one.

ASTM A335 P22 Alloy Steel Pipes Material and Grades

Of all the A335 chrome-moly pipes, P22 is the grade that most plants use at the heart of their hot systems. ASTM A335 sets 1.90–2.60% chromium and 0.87–1.13% molybdenum, with carbon of 0.05–0.15% and silicon up to 0.50%.

In the A335 family, it sits above P11 in chromium and molybdenum and below P5 and P9 in chromium. Yet it keeps a real advantage over those two higher-chrome grades. It has strong, proven creep performance, a long track record in hydrogen service and good weldability.

When a drawing names P22 alongside extras such as hardness limits, impact testing or tramp-element limits, tell us when you enquire. That way we can choose and test the right heat from the start.

ASTM A335 P22 vs P11 and P91 Alloy Steel Pipes

P22 is the middle rung of the ladder most designers climb. Think of it as the step up from P11 and the step before P91.

Pick P22 when P11 is too light for the temperature or hydrogen load but P91 would be overkill. Choose P91 for high-temperature boiler pipework where its higher strength lets you cut wall thickness and weight.

Elevated Temperature and Corrosion Performance of ASTM A335 P22 Alloy Steel Pipes

P22 does its best work in hot steam and hot hydrogen. It resists creep well up to roughly 600 °C, and its chromium builds a protective scale in air.

In hydrocrackers and hydrotreaters, 2¼Cr-1Mo is a long-standing choice because it resists hot hydrogen attack better than carbon steel, within the limits of the Nelson curves. Its sulfur resistance is moderate. For sulfur-heavy streams, P5 or P9 gives more margin.

Know the one weak point before specifying it. In long service between about 375 and 575 °C, 2¼Cr-1Mo steels can lose toughness through temper embrittlement. Refinery specifications often counter this by capping phosphorus, tin, antimony and arsenic, using measures known as the J-factor and X-bar. If your unit needs this, say so at the enquiry stage.

Welding needs preheat of roughly 200–300 °C and post-weld heat treatment of roughly 700–760 °C, always as your welding procedure specification directs.

Because P22 is a low-alloy steel, it rusts in damp air. Keep it coated until it goes into service, and choose stainless or duplex where corrosion, not heat, is the problem.

ASTM A335 P22 Alloy Steel Pipes Chemical Composition

Limits per ASTM A335 for grade P22.

ASTM A335 P22 Alloy Steel Pipes Mechanical Properties

These are room-temperature minimums. At working temperature, allowable stress is lower, so take wall thickness from your design code at the actual operating temperature.

ASTM A335 P22 Alloy Steel Pipes Size and Weight Chart

Weight per metre = (OD − wall) × wall × 0.02466, with OD and wall in mm. Treat the answers as estimates, since the wall tolerance moves the real weight.

Schedule 40

Schedule 80

A full chart for heavier schedules and other sizes is available on request.

ASTM A335 P22 Alloy Steel Pipes Sizes, Dimensions and Schedules

P22 pipe comes from ½" up to 24" NB. Thin schedules such as 20 and 40 serve lower-pressure steam and heater piping. Sch 80 to XXS serve the heavy-duty end, where hydrogen pressure or main steam loads are high. Your design pressure and temperature decide the wall, and we can help you check it.

Where standard sizes fall short, we can make non-standard OD and wall pairs to drawing. Delivery is in single random, double random or cut lengths, with plain, beveled or threaded ends. A varnish or paint coat goes on before dispatch to keep rust away in transit and in the yard.

ASTM A335 P22 Alloy Steel Pipes Common Materials

ASTM A335 P22 Alloy Steel Pipes are made from chromium-molybdenum alloy steel designed for high-temperature service. Reliable ASTM A335 P22 Alloy Steel Pipes Suppliers provide material that meets the required chemical composition and mechanical properties, supported by material test certificates.

Chromium (Cr): Improves oxidation resistance and high-temperature performance.

Molybdenum (Mo): Helps maintain strength and resist creep under prolonged heat and stress.

Carbon (C): Contributes to the steel's strength and hardness.

Manganese (Mn): Supports strength and steel processing.

Silicon (Si): Acts as a deoxidizing element during steel production.

Phosphorus (P) and Sulfur (S): Must remain within the specified limits to maintain material quality.

When sourcing these pipes, compare suppliers based on ASTM A335 compliance, chemical composition, heat treatment, dimensional requirements, and EN 10204 Type 3.1 material test certificates. These checks help ensure the selected material meets your project's operating conditions.

ASTM A335 P22 Alloy Steel Pipes Applications

• Hydrocrackers and Hydrotreaters: Hot hydrogen lines where P22 has a long service record.
• Power Boilers: Main steam lines, superheater and reheater piping and headers.
• Refinery Heaters: Furnace piping and outlet lines running at sustained high heat.
• Heat Recovery Boilers: High-temperature steam pipework in combined cycle plants.
• Petrochemical Crackers: Steam and process lines in cracking and reforming units.
• Fertilizer Plants: Hot gas and steam lines in ammonia and urea units.
• Synthetic Fuel Units: Hydrogen-bearing lines in gasification and conversion plants.
• Oil and Gas Processing: High-temperature process piping in gas plants and terminals.

ASTM A335 P22 Alloy Steel Pipes Common Materials

ASTM A335 P22 Alloy Steel Pipes are made from chromium-molybdenum steel for high-temperature applications. As a trusted ASTM A335 P22 Alloy Steel Pipes Supplier in India, we focus on supplying pipes that meet the required chemical composition, mechanical properties, and applicable ASTM standards, along with material test certificates for verification.

Chromium (Cr): Improves oxidation resistance and high-temperature performance.

Molybdenum (Mo): Helps maintain strength and resist creep under prolonged heat and stress.

Carbon (C): Contributes to the steel's strength and hardness.

Manganese (Mn): Supports strength and steel processing.

Silicon (Si): Helps remove oxygen during steel production.

Phosphorus (P) and Sulfur (S): Must remain within specified limits to maintain material quality.

When sourcing these pipes, check chemical composition, heat treatment, dimensions, and EN 10204 Type 3.1 material test certificates. These details help confirm that the material meets your project's technical requirements.

Countries We Export ASTM A335 P22 Alloy Steel Pipes To

We export ASTM A335 P22 Alloy Steel Pipes from India to customers in more than 85 countries across Asia, Europe, the Middle East, Africa, and the Americas. Our export services include secure packing, shipping documentation, and delivery coordination to meet international project requirements.

North America: USA, Canada, Mexico

Europe: Germany, United Kingdom, France, Italy, Netherlands, Spain, Poland

Middle East: UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain

Asia-Pacific: Singapore, Malaysia, Indonesia, Australia, Japan, South Korea, Vietnam

Africa: South Africa, Nigeria, Egypt, Kenya, Morocco

South America: Brazil, Argentina, Chile, Peru

As an ASTM A335 P22 Alloy Steel Pipes Exporter in India, we supply pipes for power plants, refineries, petrochemical facilities, and other high-temperature industrial applications. We coordinate material specifications, EN 10204 Type 3.1 test certificates, and inspection requirements according to each order. Our focus on clear communication, proper documentation, and efficient shipping helps simplify international procurement and supports deliveries to industrial projects worldwide.