Alloy Steel Pipe

MAIN STEEL PIPE PRODUCTS

Alloy Steel Boiler Tubes, Superheater Tubes, Heat Exchanger Tubes
Size: Outside Diameter: 3/4" to 4", Wall Thickness: 1mm to 20mm
Standard: SA-213M T11, T12, T5, T9, SA-209M T1A, ASTM A335 P11, P22, P5, P9, GB/T 5103
Application: Alloy Steel Tubes (Pipes) are High-pressure Boiler Tubes, which are mainly applied on Super Heaters, Reheaters, Water Walls, Economizers of the Super Critical and Ultra Super Critical Boilers, the Alloy Tubes required to have high creep rupture strength. 

 

 

 

 

Alloying Elements & Their Effects
Chromium – Adds hardness. Increased toughness and wear resistance.
Cobalt – Used in making cutting tools; improved Hot Hardness (or Red Hardness).
Manganese – Increases surface hardness. Improves resistance to strain, hammering & shocks.
Molybdenum – Increases strength. Improves resistance to shock and heat.
Nickel – Increases strength & toughness. Improves corrosion resistance.
Tungsten – Adds hardness and improves grain structure. Provides improved heat resistance.
Vanadium – Increases strength, toughness and shock resistance. Improved corrosion resistance.
Chromium-Vanadium – Greatly improved tensile strength. It is hard but easy to bend and cut.

GNEE Provides Pipes, Tubes and Hollow Sections
Norms
API 5L – Line Pipe
ASTM A 53 – Black and Hot-Dipped, Zinc-Coated, Welded and Seamless, Steel Pipe
ASTM A 106 – Seamless Carbon Steel Pipe for High-Temperature Service
ASTM A 213 – Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
ASTM A 269 – Seamless and Welded Austenitic Stainless Steel Tubing for General Service
ASTM A 312 – Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
ASTM A 333 – Seamless and Welded Steel Pipe for Low-Temperature Service
ASTM A 335 – Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
ASTM A 358 – Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications
ASTM A 671 – Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures
ASTM A 672 – Electric-Fusion-Welded Steel Pipe for High-Pressure Service at Moderate Temperatures
ASTM A 790 – Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
ASTM A 928 – Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal
EN 10208-2 – Steel pipes for pipelines for combustible fluids – Part 2: Pipes of requirement class B
EN 10210-1/2 – Hot finished structural hollow sections of non-alloy and fine grain steels
EN 10216-1 – Seamless steel tubes for pressure purposes – Part 1: Non-alloy steel tubes with specified room temperature properties
EN 10216-2 – Seamless steel tubes for pressure purposes – Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties
EN 10217-1 – Welded steel tubes for pressure purposes – Part 1: Non-alloy steel tubes with specified room temperature properties
EN 10217-2 – Welded steel tubes for pressure purposes – Part 2: Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties
EN 10219-1/2 – Cold formed welded structural hollow sections of non-alloy and fine grain steels
EN 10297-1 – Seamless circular steel tubes for mechanical and general engineering purposes – Part 1 Non-alloy and alloy steel tubes

ALLOY STEEL PIPE PROCESSING
GNEE offers a variety of steel pipe processing options. From sawing and processing tube blanks to complex bending and upsetting operations, we actively assist you throughout the entire project.

USES OF ALLOY STEEL PIPES

1. Petroleum, chemical industry, natural gas and other fields
Alloy steel pipe is an important supporting equipment in the fields of petroleum, chemical industry, natural gas and other fields. Its strength and corrosion resistance play an important role in ensuring the safety of pipeline transportation. In oil extraction and transportation, alloy steel pipes are often used in drilling, oil well casing, gas production pipelines, gas reservoir storage equipment, pipeline transportation equipment, etc. In the fields of oil refining, chemical industry, fertilizer, etc., alloy steel pipes are often used in chemical reactors, ethylene towers, distillation towers, separation towers and other equipment under high temperature and high pressure conditions.
2. Machinery, automobile, aerospace and other fields
Alloy steel pipes are also widely used in machinery, automobiles, aerospace and other fields. In the mechanical field, alloy steel pipes are often used as bearings, drive shafts, shock absorbing springs, pneumatic and hydraulic components. In the automotive field, alloy steel pipes are used to manufacture high-pressure oil pipes, fuel injectors, exhaust pipes, etc. In the aerospace field, alloy steel pipes are used to manufacture high-pressure gas supply systems, hydraulic systems, engines, etc.

 

 

 

 

ALLOY STEEL PIPEINSPECTION

Chemical composition inspection, mechanical properties test (tensile strength, yield strength, elongation, flaring, flattening, bending, hardness, impact test), surface and dimension test, no-destructive test, hydrostatic test.

DELIVERY

Steel pipe delivery status(condition)

Steel pipe delivery status(condition): cold / hard (BK), cold / soft (BKW), after cold stress relief annealing (BKS), annealing (GBK), normalized (NBK).

Condition on delivery of steel pipe

GNEE PACKAGING AND SHIPPING

Bare packed/bundled packed/crate packed/tubes with wooden protection on both sides and suitably protected for sea shipping or as per requirement.

Install plastic caps on both sides of the pipe ends
Damage caused by bundling and transportation should be avoided
Bundling signs should be uniform and consistent
The same bundle (batch) of steel pipes should come from the same furnace.
The steel pipes have the same furnace number, the same steel grade, and the same specifications.

Usually bundled and packed with strong metal strips;
Packed naked or packed in woven bags or puppet films, or placed in wooden boxes;
If not in bundles we put the tubes in tubes or single tubes,
If the pipe length is ≤5.8m, load it into a 20' container,
If the length of the pipe is ≤11.8m, load it into a 40' container,
If the pipe length is > 11.8m, it is loaded on board in bulk FILO terms.

 

 

 

 

We're well-known as one of the leading alloy steel pipe manufacturers and suppliers in China. If you're going to buy discount alloy steel pipe in stock, welcome to get quotation and free sample from our factory. Also, customized service is available.