High Pressure Alloy Steel Pipe Manufacturer

High Pressure Alloy Steel Pipe

Full global standard coverage: GB/T5310, ASTM A335, ASME SA335, EN10216‑2 for power & petrochemical projects
Rich grade portfolio: heat‑resistant alloy grades plus A333 low‑temperature grades for diverse operating conditions
Wide dimension range OD14‑720mm, wall 2‑120mm, complete Sch40/Sch80/Sch160 heavy‑wall high‑pressure specifications
Strict 100% factory inspection: hydrostatic pressure test, eddy‑current test and UT ultrasonic testing before delivery

Product Overview

High Pressure Alloy Steel Pipe is a seamless alloy steel pipe specially designed for high-temperature and high-pressure service conditions in power generation, petrochemical, coal chemical, hydrogen energy, and other heavy industrial systems. It provides reliable pressure-bearing performance for pipelines and equipment operating under severe temperature, pressure, and medium conditions.

This product covers a wide range of heat-resistant alloy steel grades, including 15CrMoG, 12Cr1MoVG, 12Cr2Mo1G, P5, P11, P22, P91, P92, 13CrMo4-5, and 16Mo3. Low-temperature service grades such as A333 Gr.3, Gr.4, and Gr.6 are also available for different working environments.

Manufactured according to international standards including GB/T 5310, ASTM A335, ASTM A213, EN 10216-2, and ASME SA335, High Pressure Alloy Steel Pipe is suitable for safety-critical pressure systems requiring stable mechanical properties and high-temperature resistance.

With an outer diameter range of 14-720mm and wall thickness range of 2-120mm, the product covers heavy-wall specifications such as Sch40, Sch80, and Sch160. Each pipe undergoes 100% hydrostatic testing, eddy-current testing, and ultrasonic inspection before delivery.

High Pressure Alloy Steel Pipe

Chemical & Mechanical Property Snapshot

Grade	Standard	C (%)	Si (%)	Mn (%)	Cr (%)	Mo (%)	Yield Strength Rp0.2 (MPa)	Tensile Strength Rm (MPa)	Elongation A (%)
15CrMoG	GB/T 5310	0.12–0.18	0.17–0.37	0.40–0.70	0.80–1.10	0.40–0.55	≥245	440–640	≥21
12Cr1MoVG	GB/T 5310	0.08–0.15	0.17–0.37	0.40–0.70	0.90–1.20	0.25–0.35	≥255	470–640	≥21
12Cr2Mo1G	GB/T 5310	0.08–0.15	≤0.50	0.30–0.60	2.00–2.50	0.90–1.10	≥280	520–680	≥18
P11	ASTM A335	0.05–0.15	0.50–1.00	0.30–0.60	1.00–1.50	0.44–0.65	≥205	≥415	≥30
P22	ASTM A335	0.05–0.15	≤0.50	0.30–0.60	2.00–2.50	0.90–1.10	≥205	≥415	≥30
P91	ASTM A335	0.08–0.12	0.20–0.50	0.30–0.60	8.00–9.50	0.85–1.05	≥415	≥585	≥20
P92	ASTM A335	0.07–0.13	0.20–0.50	0.30–0.60	8.50–9.50	0.30–0.60	≥440	≥620	≥20
A333 Gr.3	ASTM A333	≤0.19	0.18–0.37	0.31–0.64	—	—	≥205	≥415	≥30
13CrMo4-5	EN 10216-2	0.10–0.18	0.15–0.35	0.40–0.70	0.70–1.15	0.40–0.60	≥275	440–590	≥21

Detailed Technical Specifications

Category	Details
Product Name	High Pressure Alloy Steel Pipe
Product Type	Seamless alloy steel pipe (Round / Square / Rectangular / Special‑shaped)
Executive Standards	GB/T 5310, ASTM A335, ASTM A213, EN 10216‑2, ASME SA335
Chinese Standard Grades	15CrMoG,12Cr1MoVG,12Cr2Mo1G,16MnDG,10Cr9Mo1VNb (P91/P92)
ASTM Grades	P5, P9, P11, P12, P22 (13CrMo45), P91, P92, P911, A333 Gr.3,Gr.4,Gr.6
European Grades	13CrMo4-5 (1.7335), 16Mo3 (1.5415), 10CrMo9-10 (1.7380)
Outer Diameter Range	14mm‑720mm (0.55 inch ‑ 28.35 inch)
Wall Thickness Range	2mm‑120mm (0.078 inch ‑4.72 inch)
Schedule Series	Sch40, Sch80, Sch160 heavy‑wall specifications
Available Shape	Round seamless pipe, Square alloy pipe, Rectangular alloy pipe, Custom special‑shaped profiles
Testing Methods	100% hydrostatic pressure test, 100% eddy‑current inspection, 100% ultrasonic flaw detection
Quality Documents	Mill Test Certificate including heat number, chemical composition, mechanical properties and NDT records
Minimum Order Quantity	5 Metric Ton
Trade Terms	FOB, CFR, CIF, DAP, EXW
Payment Terms	T/T, L/C at sight
Packing	End‑capped, bundled with steel strips, seaworthy export wooden crate / steel bundle for sea transportation

Shape Options

Available Pipe Shapes
Round High‑Pressure Alloy Pipe: Main product for boiler, heat‑exchanger, high‑pressure process pipeline, full Sch40‑Sch160 heavy wall sizes
Square Alloy Steel Pipe: Custom seamless square alloy tube for high‑pressure structural frame, pressure equipment support
Rectangular Alloy Steel Pipe: Custom seamless rectangular alloy profile for heavy‑duty industrial structural components
Special‑Shaped Alloy Pipe: Oval, hexagon and other special cross‑section, non‑standard dimension upon customer drawing

Dimension Reference Table

Outer Diameter (mm)	Outer Diameter (inch)	Wall Thickness (mm)	Wall Thickness (inch)	Common Schedule
14	0.55	2–6	0.078–0.236	Sch40
21.3	0.84	2.77–8	0.109–0.315	Sch40 / Sch80
33.7	1.33	3.38–10	0.133–0.394	Sch40 / Sch80 / Sch160
60.3	2.37	4–16	0.157–0.630	Sch40 / Sch80 / Sch160
114.3	4.50	6–30	0.236–1.181	Sch40 / Sch80 / Sch160
168.3	6.63	8–45	0.315–1.772	Sch40 / Sch80 / Sch160
219.1	8.63	10–60	0.394–2.362	Sch80 / Sch160 Heavy Wall
323.9	12.75	12–80	0.472–3.150	Heavy-Wall High-Pressure
406.4	16.00	14–100	0.551–3.937	Custom Heavy Wall
720	28.35	20–120	0.787–4.724	Extra Heavy-Wall Custom

Product Comparison Table

China GB Grade	ASTM A335 / A333 Grade	EN European Grade	Main Feature	Working Temperature	Typical Application
15CrMoG	P11	13CrMo4-5 (1.7335)	1Cr-0.5Mo heat-resistant alloy	≤550°C	Power boiler superheater, heat exchanger tube
12Cr1MoVG	P12	—	1.25Cr-0.3Mo-V vanadium alloy	≤580°C	Boiler header, main steam pipeline
12Cr2Mo1G	P22	10CrMo9-10 (1.7380)	2.25Cr-1Mo high-creep alloy	≤600°C	Petrochemical hydrogenation reactor piping
—	P9	16Mo3 (1.5415)	0.5Cr-0.5Mo	≤500°C	General high-pressure heat-exchange pipe
—	P5	—	5Cr-0.5Mo anti-oxidation alloy	≤650°C	Refinery high-temperature furnace tube
10Cr9Mo1VNb	P91	—	9Cr-1Mo-V-Nb martensitic heat-resistant alloy	≤620°C	Ultra-supercritical power boiler
—	P92	—	9Cr-W-Mo advanced creep-resistant alloy	≤630°C	Ultra-supercritical main steam pipe
16MnDG	A333 Gr.3	—	Low-temperature impact-resistant alloy	-45°C	Cryogenic process pipeline
—	A333 Gr.4	—	Low-temperature alloy	-100°C	Low-temperature chemical equipment piping
—	A333 Gr.6	—	Low-temperature carbon-manganese steel	-45°C	Cold-service pressure pipeline

App Market

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Product Packaging

Secure Export Packaging For Safe Handling And Delivery

FAQs

What is High Pressure Alloy Steel Pipe used for?

High Pressure Alloy Steel Pipe is mainly used for high-temperature and high-pressure systems such as power boilers, petrochemical pipelines, coal chemical equipment, hydrogen energy systems, and fertilizer plants.

What standards are available for High Pressure Alloy Steel Pipe?

The product is manufactured according to GB/T 5310, ASTM A335, ASTM A213, EN 10216-2, and ASME SA335 standards.

Which material grades are available?

Available grades include 15CrMoG, 12Cr1MoVG, P5, P11, P22, P91, P92, 13CrMo4-5, 16Mo3, and A333 Gr.3/4/6 for low-temperature applications.

What sizes can be supplied?

High Pressure Alloy Steel Pipe is available with outer diameter from 14mm to 720mm and wall thickness from 2mm to 120mm.

How is product quality inspected?

Each pipe receives 100% hydrostatic testing, eddy-current testing, and ultrasonic testing before shipment.

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High Pressure Alloy Steel Pipe Manufacturer