Alloy Steel Pipes

High-Temperature Power Piping

Alloy Steel Pipes

Chrome-molybdenum alloy steel pipes for high-temperature, high-pressure power plant and refinery piping systems.

Alloy Steel Pipes

ASTM / ASME Certified Material

Product Overview

Alloy steel pipes carrying chromium-molybdenum additions are used wherever piping must withstand sustained high temperature and pressure — boiler headers, superheater lines, catalytic reformers and furnace piping.

We stock the full P-grade family from P1 through to the modern creep-resistant P91, each supplied with heat treatment records and mechanical test reports.

Size Range1/2″ – 24″ NB
Wall ThicknessSCH 40 – XXS
FormSeamless, Hot Finished
Heat TreatmentNormalised & Tempered

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Photo Gallery

Alloy Steel Pipes — In Our Stockyard

Specification

Available Grades

Grade	Standard	Typical Service
P1	ASTM A335	Low alloy content, moderate temperature service
P5 / P5b	ASTM A335	5% Chrome — refinery & petrochemical heater tubing
P9	ASTM A335	9% Chrome — high-temperature furnace piping
P11	ASTM A335	1.25Cr-0.5Mo — power plant steam lines
P22	ASTM A335	2.25Cr-1Mo — boiler & superheater piping
P91	ASTM A335	9Cr-1Mo modified — ultra-high-temperature power piping

Technical Data

Specifications

Outside Diameter21mm – 610mm
Wall Thickness2mm – 60mm
LengthUp to 7m, random or cut
ManufactureSeamless, hot finished, cold drawn

End FinishPlain, Bevelled
TestingHydrostatic, UT, PMI on request
CertificationEN 10204 3.1 / 3.2 Mill Test Cert.
PackingBundles, export wooden crates

Technical Note — Positive Material Identification (PMI) is available on every lot to confirm chromium and molybdenum content prior to dispatch — essential for critical power and refinery piping where grade mix-up is not an option.

Where It's Used

Applications

Power Generation

Refineries

Petrochemical Plants

Boilers & Heat Exchangers

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