ASTM B514 UNS N08800 Inconel 800H Inconel Nickel Alloy Welded Pipe for Gas Processing

ASTM B514 Inconel 800H UNS N08800 Nickel Alloy Welded Pipe for Gas Processing
 

ASTM B514 is standard developed by the American Society for Testing and Materials, specifically addresses "welded nickel-iron-chromium alloy pipe," prescribing the product's chemical composition, mechanical properties, dimensional tolerances, testing methods, and technical requirements. UNS N08800 alloy steel is more commonly known commercially as Incoloy 800.

Although strictly speaking, Incoloy 800 is a nickel-iron-chromium alloy with a nickel content of approximately 30-35% and an iron content of approximately 39%, its properties are closer to those of nickel-based alloys, and for this reason, it is often referred to as such. Welded pipe, unlike seamless pipe, is produced by cold-rolling flat sheets or coils and then welding the seams together. The welding method of choice is typically shielded inert gas welding, such as TIG.

ASTM B514 N08800 Quality Control and Testing Requirements

• Chemical Composition Analysis: Verifies that the alloy composition meets the requirements of N08800.
• Mechanical Property Testing: Such as tensile testing, verifies tensile strength, yield strength, etc.
• Hydraulic Testing or Nondestructive Testing: Each pipe must undergo a hydrostatic test, or alternative nondestructive testing methods such as eddy current testing or radiographic testing, to verify its sealing and weld integrity.
• Dimensional and Wall Thickness Inspection.
• Weld Macrostructure Inspection: Checks the weld fusion and form quality.
• Intergranular Corrosion Testing (if required): Evaluates the material's resistance to intergranular corrosion.

ASTM B514 800H UNS N08800 Chemical Composition

 
 ASTM B514 800H UNS N08800 Mechanical Properties

Applications of ASTM B514 N08800 Nickel-Based Alloy Welded Pipe

• Petrochemical Industry: In the petrochemical industry, ASTM B514 N08800 nickel-based alloy welded pipe is widely used in applications exposed to high-temperature, sulfur- and hydrogen-containing environments, such as ethylene cracking furnace tubes, reformer tubes, and heat exchanger tubes.
• Chemical Processing: In the chemical processing industry, ASTM B514 N08800 nickel-based alloy welded pipe is used in pipes and heat exchangers handling corrosive media such as acids and alkalis.
• Nuclear Power Industry: In the nuclear power industry, ASTM B514 N08800 nickel-based alloy welded pipe is used as heat exchanger tubing in nuclear power plants.
• Energy and Power: In the energy and power industry, ASTM B514 N08800 nickel-based alloy welded pipe is used as superheater and reheater tubes in gas turbines and boilers.
• Industrial Furnace Manufacturing: ASTM B514 N08800 nickel-based alloy welded pipe is used in radiant tubes, muffles, and other applications.