Astm A333 Grade 7 Seamless Pipe

Standard & Grade

• Standard: ASTM A333
• Grade: Grade 7
• ASME Equivalent: SA333 Gr.7
• Product type: Seamless or welded steel pipe
• Service: Low-temperature applications

Manufacturing

• Manufactured by seamless or welded process
• No filler metal used in welded construction, as specified
• Material comparable to AISI 4032 low alloy steel

Dimensions

• Outside diameter: 19.05 mm – 114.3 mm
• Wall thickness: 2.0 mm – 14 mm
• Maximum length: 16000 mm

Applications

• Low-temperature service pipelines
• Seamless and welded steel piping systems

Inspection & Testing

• Chemical composition inspection
• Mechanical tests: tensile strength, yield strength, elongation
• Flaring, flattening, bending, and hardness tests
• Impact testing at specified temperatures
• Surface and dimensional inspection
• Non-destructive testing
• Hydrostatic test

Chemical Composition (%)

• Carbon (max): 0.19
• Manganese: 0.9
• Phosphorus (max): 0.025
• Sulfur (max): 0.025
• Silicon: 0.13 – 0.32
• Nickel: 2.03 – 2.57
• Chromium: Not specified

Mechanical Properties

• Tensile strength (min): 450 MPa
• Yield strength (min): 240 MPa
• Elongation (min), L/T: 30% / 16.5%

Impact Requirements

• Notched-bar impact testing performed on sets of three specimens
• Measured values must meet or exceed ASTM A333 specified minimums

Surface Treatment

• Oil dip
• Varnish
• Passivation
• Phosphating
• Shot blasting

Packing & Marking

• Bare packing, bundle packing, or crate packing
• Wooden protection at both ends of pipes
• Sea-worthy export packing as requested
• Each crate marked with order number, heat number, dimensions, weight, and bundle details