Purchasers must specify the following details when placing an order:

• Quantity (total length or number of tubes)
• Material (seamless cold-drawn low-carbon steel)
• Dimensions (outside diameter, wall thickness – in inches [A179] or mm [A179M])
• Length (cut to size or random lengths)
• ASTM Designation (A179 for inch-pound units, A179M for metric)
• Testing Requirements (hydrostatic, nondestructive electric test, or other)
• Certification (if required)
• Additional Requirements (special finishes, marking, etc.)

• Steel Process: Made by open-hearth, electric furnace, or basic oxygen process.
• Manufacturing Method: Tubes are cold-drawn, seamless, and supplied in as-drawn or annealed condition.

• Hydrostatic Test: Each tube must withstand a specified water pressure without leakage.
• Nondestructive Electric Test (NDE): Optional alternative like eddy current or ultrasonic testing.
• Flattening Test: A sample tube must flatten without cracking to a specified distance.
• Flaring Test: A cone expansion test to verify ductility.
• Hardness Test: Optional, per agreement.

• Outside Diameter: Permissible variations as specified by standard.
• Wall Thickness: Must meet minimum requirements with allowable tolerances.
• Length: Cut lengths (±1/8 in. or ±3.2 mm) or random lengths as agreed.

• Inspection: Conducted by manufacturer; third-party verification available upon request.
• Certification: Mill test reports covering chemical & mechanical properties provided upon request.

Each tube must be clearly marked with:

• ASTM standard (A179/A179M)
• Manufacturer’s name or trademark
• Size (OD & wall thickness)
• Heat number or identification

This standard ensures quality, strength, and corrosion resistance for heat-transfer applications in power plants, refineries, and chemical processing.