ASTM A335 P1 Pipes

Name: ASTM A335 P1 Pipes
Brand: USA Piping Solution
SKU: ASTM-A335-P1-PIPE-USA
Availability: InStock
Rating: 4.9 (25 reviews)

ASTM A335 P1 Alloy Steel Seamless Pipes: Supplier & Exporter

USA Piping Solution is a leading distributor, manufacturer and exporter of ASTM A335 P1 Pipes, which are often considered high temperature alloy steel piping products. Also known as A335 P1 Alloy Steel Pipe, these materials are seamless, ferritic alloy steel pipes designed for high-temperature applications requiring precise performance or consistency under high temperatures, such as power generation and oil/gas industrial applications. USA Piping Solution understands the stringent requirements of these industries, and we maintain a large inventory of pipes ready to dispatch in various diameter sizes, wall thicknesses and schedules. All pipes are sourced from approved mills that are globally audited, providing quality assurance and full traceability to meet your project-specific needs.

What are ASTM A335 P1 Pipes?

ASTM A335 P1 is a specification for seamless, alloy steel pipe designed for high-temperature service, typically called "chrome-moly" pipe due to its basic alloying elements. The A335 P1 Alloy Steel Pipe is a chromium-molybdenum (Cr-Mo) alloy, but it has lower alloy content than other P-grades. The amount of alloy material is relatively small, but it is made to perform well. Molybdenum increases the tensile strength, creep resistance and overall toughness of steel at high-temperature. Chromium improves corrosion and oxidation resistance. The seamless nature allows the pipe to have a uniform wall thickness throughout, with no welded seam, which is paramount for service at high temperature while under high pressure, limiting the potential for failure associated with a welded or compromised pipe in critical service.

ASTM A335 P1 Pipes Specifications

Our ASTM A335 P1 Pipes are manufactured and tested to meet international standards. We supply pipes in various specifications, including:

Specification	Details
Standard	ASTM A335, ASME SA335, EN 10216-2
Size	½” NB to 24” NB (Nominal Bore)
Schedule	SCH 20, 30, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS. We also provide custom wall thicknesses to meet specific project demands.
Type	Seamless.
Ends	Plain End (PE) for butt welding or socket welding, and Bevelled End (BE) for butt welding.

Chemical Composition of ASTM A335 P1 Pipes

The specific chemical makeup of ASTM A335 P1 is crucial for its performance characteristics. The table below outlines the maximum permissible content of each element, as per the ASTM standard.

Element	Content (%)
Carbon (C)	0.28 max
Manganese (Mn)	0.30–0.80
Phosphorus (P)	0.025 max
Sulfur (S)	0.025 max
Silicon (Si)	0.10–0.50
Chromium (Cr)	0.50 max
Molybdenum (Mo)	0.50 max

Mechanical Properties of ASTM A335 P1 Pipes

The mechanical properties will determine how the material will behave under stress and heat. For A335 P1, these properties are key as they play an important role in the safety and longevity of the pipe in high-pressure applications.

Property	Value
Tensile Strength	415 MPa (60,000 psi) min
Yield Strength	205 MPa (30,000 psi) min
Elongation	30% min

Equivalent Of ASTM A335 P1 Pipes

ASTM A335 P1 has several equivalent grades under different international standards, which allows for global interchangeability.

Country	Standard
Germany	DIN 17175: 15Mo3
USA	ASTM A213 T1
Japan	JIS G3458: STPA12
France	AFNOR NF A 49-211: TU 15D3

ASTM A335 P1 Pipes Outside Diameter & Tolerance

The dimensional tolerances for ASTM A335 P1 pipes are strictly controlled to ensure a precise fit in complex piping systems.

Outside Diameter (OD)	OD Tolerance
Up to 48.3 mm	+0.40 / -0.80 mm
60.3 to 114.3 mm	+0.40 / -0.80 mm
139.7 to 273.1 mm	+0.40 / -0.80 mm
323.9 to 508.0 mm	+0.40 / -0.80 mm

ASTM A335 P1 Pipes Wall Thickness

Wall Thickness (WT)	WT Tolerance
Up to 2.5 mm	+0.25 / -0.25 mm
2.5 to 5.0 mm	+0.30 / -0.30 mm
5.0 to 10.0 mm	+0.40 / -0.40 mm
> 10.0 mm	+0.50 / -0.50 mm

Applications of ASTM A335 P1 Pipes

ASTM A335 P1 alloy steel pipes find wide-spread service wherever moderately high temperature strength and, cost effectiveness, are a necessity. It is a well-balanced chemistry and mechanical profile that makes P1 appropriate for applications that do not require extremely high creep resistance, but still are looking for a reasonable service life. Some common industries and applications include:

Power Generation Facilities: Components of piping steam lines, headers and boiler tubes used in steady-state and moderate operating conditions.
Oil Refineries: Components of heater lines and fluid transfer; piping with economical and performance expectations.
Chemical and Petro-Chemical: Heat exchanger tubing, process piping and reactor system components needing moderate creep strength and consistently oxidation resistant.
Industrial Boilers: Boiler tubes and pressure vessels used in medium-pressure steam service.
General steam distribution systems: Applications in industrial steam lines and auxiliary piping systems.

Why Choose USA Piping Solution for ASTM A335 P1 Pipes

In selecting ASTM A335 P1 pipes, time and reliability - are critical. At USA Piping Solution, we provide:

Competitive pricing with bulk project terms
Extensive stock availability for urgent needs
Accurate dimensions to support fabrication and fit-up
Third party inspection certifications for quality assurance
On-time delivery to meet the deadlines

With P1 pipes, our focus is on value and project consistency. We have become a trusted supplier for industries where standard high-temperature pipelines are required.

Get a Quote for ASTM A335 P1 Pipes

Looking for ASTM A335 P1 pipes? We provide competitive pricing, available stock, and timely delivery for projects of all sizes. Contact our sales team today for a prompt, customized quote that meets your exact requirements.

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Frequently Asked Questions

What is the main difference between ASTM A335 P1 and other P-grades?

ASTM A335 P1 is a low alloy steel, containing very few elements, chiefly Chromium and Molybdenum. It is designed for high-temperature services that require moderate strength and moderate creep resistance, not for more aggressive corrosive services, or extreme high temperature services requiring alloys with higher strength, such as P11 or P22.

Can ASTM A335 P1 pipes be used in high-pressure systems?

Yes, the ASTM A335 P1 pipes are seamless, meaning there is no welded seam, and a uniform wall thickness throughout the pipe. This provides high potential for loading applications requiring high pressure as would be found in boilers, refineries and power generation systems. The design of seamless pipes is best suited for those applications.

What types of certifications and documentation come with my order?

Every ASTM A335 P1 Alloy Steel Seamless Pipe order from USA Piping Solution comes with full documentation. Please note a seamless pipe - that means there is a Mill Test Certificate (MTC) that provides Chemical Analysis, Mechanical Properties, and if you require third-party inspection documentation these can be included for full traceability.

What is the typical lead time for an order of A335 P1 pipes?

We have a large stock supply of ASTM A335 P1 pipes in our stockyards, and can offer Just in Time deliveries to support urgent projects. With custom orders we can provide timelines depending on the size and scope of your project, our logistics department will make all efforts to deliver your material at the earliest.

Are these pipes suitable for welding?

The ASTM A335 P1 is a low-carbon alloy steel with good weldability. However, it is recommended that the appropriate welding procedures, including pre-heating and post-weld heat treatment should be followed to sustain the mechanical properties and prevent cracking. It is advisable to seek the advice of a welding engineer and follow the recommended standards.