ASTM A335 P91 Alloy Steel Pipe Supplier from China

TEWOO-ITD of Xinhongsheng Metal supplies ASTM A335 P91 alloy steel pipe for demanding high-temperature and high-pressure applications in power generation, refinery, petrochemical and boiler systems.

P91 is a chromium-molybdenum alloy steel widely used where strength, heat resistance and creep resistance are required. It is commonly selected for critical piping systems that operate under elevated temperature and pressure conditions, especially in ultra-supercritical power plants and other high-performance industrial projects.

As a China-based steel pipe supplier, we support global buyers with stable production, export packaging, inspection documents and project-based supply solutions.

Introduction

ASTM A335 P91 pipe is a seamless ferritic alloy steel pipe designed for high-temperature service. Compared with ordinary carbon steel pipe, P91 offers better strength retention at elevated temperatures, improved creep resistance and strong performance in long-term operating environments.

This makes P91 a preferred material for:

• Power plant boiler systems

• Steam pipelines

• Refineries

• Petrochemical plants

• High-pressure process systems

TEWOO supplies P91 pipes in standard export specifications and can support custom requirements for project orders.

Specifications

Product Name: ASTM A335 P91 Alloy Steel Pipe
Material Grade: P91 / 9Cr-1Mo-V
Pipe Type: Seamless alloy steel pipe
Standard: ASTM A335 / ASME SA335
Manufacturing Condition: Hot finished or heat treated, depending on requirement

Common Product Features

• High-temperature resistance

• Good creep strength

• Stable mechanical performance

• Suitable for pressure and heat service

• Project-oriented supply available

Typical Related Standards

• ASTM A335

• ASME SA335

• ASTM A213 for tubes, if required by project

• ASTM A182 / ASTM A387 related materials, depending on application

Applications

ASTM A335 P91 pipe is commonly used in industries where material performance must remain stable under severe operating conditions.

Main Applications

• Power Plant: main steam lines, reheater lines, superheater systems

• Boiler System: high-temperature pressure piping

• Refinery: process piping and high-heat service lines

• Petrochemical Plant: pressure pipeline systems

• Industrial Energy Projects: critical thermal and power equipment

Typical Service Conditions

• High temperature

• High pressure

• Long operating cycles

• Creep-critical environments

• Severe industrial service

Manufacturing & Inspection

Quality control is essential for alloy steel pipe, especially for high-temperature service applications. TEWOO-ITD supports project buyers with inspection and documentation requirements commonly requested by international EPC contractors and end users.

Manufacturing Support

• Stable raw material sourcing

• Controlled heat treatment

• Seamless pipe production

• Dimensional control

• Surface and end preparation

Inspection Support

• Mill Test Certificate (MTC)

• Chemical composition test

• Mechanical property test

• Ultrasonic testing (UT), if required

• Third-party inspection support: SGS / BV / TUV

• Project documentation support

Key Performance Focus

• Tensile strength

• Yield strength

• Elongation

• Impact performance, if specified

• High-temperature reliability

• Dimensional consistency

Available Sizes

We supply ASTM A335 P91 alloy steel pipe in common export sizes and can support custom dimensions based on project requirements.

Typical Size Range

• Outside Diameter: custom upon request

• Wall Thickness: according to specification and project requirement

• Length: 5.8m, 6m, 11.8m, 12m, or custom lengths

• Ends: plain end, beveled end, or as specified

• Surface: black finish, oiled, or as required

Custom Options

• Cut-to-length

• Beveled ends

• Special packing

• Project marking

• Third-party inspection coordination

Why Choose TEWOO-ITD of Xinhongsheng Metal

TEWOO focuses on export steel pipe supply for industrial and project buyers who need reliable communication, stable quality and professional shipping support.

Our Advantages

• Factory-direct steel pipe supply from China

• Experience with industrial and EPC project orders

• Flexible MOQ for trial and repeat orders

• Technical and documentation support

• MTC and third-party inspection available

• Export packaging and shipment coordination

• Fast quotation response for project inquiries

Best For

• Importers

• Wholesalers

• EPC contractors

• Power plant buyers

• Refinery and petrochemical project teams

• Industrial distributors

Request Quote

Need ASTM A335 P91 pipe for your project?

Send us your requirements and we will prepare a quotation for you.

Please include:

• Required size

• Quantity

• Standard / grade

• Delivery port

• Application

• Inspection requirement

• Packing requirement

WhatsApp: +1-6303406276
Email: tjtewoo.exporting@gmail.com

TEWOO supports global buyers with reliable alloy steel pipe supply, technical documentation and export service.