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Prime Tube Impex is a leading Carbon Steel ASTM A 106 GR B Pipes Manufacturer.Our goal is to fulfill the highest expectations of our customers for delivery and product quality of Carbon Seamless Steel Pipe. Information for those interested in buying Carbon Seamless Steel Pipe. the most trusted source of Carbon Seamless Steel Pipe, More about Prime Tube Impex for all Pipes & Tubes.

carbon steel astm a 106 grade b seamless pipes manufacturer

Prime Tube Impex is one of the major Indian manufacturers, exporter & suppliers of Carbon Seamless Steel Pipe & OCTG, CRA (Corrosion-Resistant Alloy) Seamless Tubes, Stainless Steel , Super Duplex , Duplex , Welded & Semaless, Carbon Steel Seamless Pipes, Tubes, Capillary Pipes & ā€˜Uā€™ Tubes for applications in oil & gas, LNG, Thermal & Nuclear Power Plants, Chemical Industries, Fertilizers Plants, (petro) chemical, shipbuilding, desalination, water treatment, energy industries, EPC and Pipes for General Engineering Purpose.

Prime Tube Impex operates according to an certified quality programme. A complete range of testing facilities on-site contributes to consistent quality control.

Carbon Steel ASTM A 106 Gr B Seamless Pipes Specification

ASTM A106 / A106M – 11 Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service

A/SA106 NPS 1/4″- 30″ Schedules 10 through 160, STD, XH and XXH
Scope Covers seamless carbon steel nominal wall pipe for high-temperature service, suitable for bending flanging and similar forming operations.
NPS 1-1/2″ and under may be either hot finished or cold drawn. NPS 2″ and larger shall be hot finished unless otherwise specified.


Process Killed steel, with primary melting process being open-hearth, basic-oxygen, or electric-furnace, possible combined with separate degassing or refining.
Steel cast in ingots or strand cast is permissible.
Hot-finished pipe need not be heat treated.
Cold-drawn pipe shall be heat treated after the final cold draw pass.

Carbon Steel Tube Carbon Steel Pipe

  • Seamless Carbon Steel Pipe (ASTM A106 Gr. B / API 5L SERIES / JIS STPG370/410)
  • Seamed carbon steel pipe (CNS4626/CNS6445/CNS2606/ASTM A53 Gr.B / BSB)
  • Alloy pipe (ASTM A333 Series / A335 Series)
  • Galvanized pipe
  • Heat exchanger tubes, boiler tubes (ASTM A179 / JIS STB 340/410)

Chemical Requirements

Grade A Grade B Grade C Total of Cr, Cu, Mo, Ni, and V shall not exceed 1%
Carbon max. % 0.25 0.30 0.35
Manganese % 0.27 to 0.93 0.29 to 1.06 0.29 to 1.06
Phosphorous, max. % 0.035 0.035 0.035
Sulfur, max. % 0.035 0.035 0.035
Silicon, min.% 0.10 0.10 0.10
Chrome, max. % 0.40 0.40 0.40
Copper, max. % 0.40 0.40 0.40
Molybdenum, max. % 0.15 0.15 0.15
Nickel, max. % 0.40 0.40 0.40
Vanadium, min.% 0.08 0.08 0.08

Permissible Variations in Wall Thickness

The minimum wall thickness at any point shall not be more than 12.5% under the nominal wall thickness specified.

Permissible Variations in Weights per Foot

Weight of any length shall not vary more than 10% over and 3.5% under that specified.

NOTE — NPS 4 and smaller — weighed in lots. Larger sizes shall be weighed separately by length.

Exports of Carbon Steel ASTM A 106 Gr B Seamless Pipes

Prime Tube Impex exports Carbon Steel ASTM A 106 Gr B Seamless Pipes in UAE, Bahrain, Saudi Arbia, Oman, Kuwait, Italy, Egypt, Indonesia, Malaysia, United States, Mexico, Chine, Brazil, Peru, Nigeria,Jordan, Dubai, Thailand (Bangkok), Venezuela, Iran, Germany, UK, Canada, Russia, Turkey, Australia, New Zealand, Sri Lanka, Vietnam, East Africa, South Africa, Kazakhstan etc.

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