ASTM A53, ASTM A153, and ASTM A123

by Jane Tian on Jun 26, 2026 Business 95 Views

ASTM A53 is a steel pipe standard used for piping systems, while ASTM A153 and ASTM A123 are hot-dip galvanizing coating standards used to protect steel components from corrosion. A53 defines pipe material and dimensions, whereas A153 and A123 define zinc coating requirements for small hardware and structural steel.
ASTM A53 vs ASTM A153 vs ASTM A123 Comparison Table

Feature ASTM A53 ASTM A153 ASTM A123
Type Pipe standard Coating standard Coating standard
Product Steel pipe Hardware parts Structural steel
Purpose Transport fluids/gas Corrosion protection Corrosion protection
Material control Yes (pipe specs) No No
Coating Optional galvanized Required hot-dip zinc Required hot-dip zinc
Thickness control Wall thickness (SCH) Zinc coating thickness Zinc coating thickness
Application Pipelines Fasteners Steel structures


Common Misunderstandings 

In industrial piping and steel standards, ASTM A53, ASTM A153, and ASTM A123 are often confused because they are used in related construction and steel applications. However, they serve completely different engineering purposes.

 A53 is NOT a coating standard

ASTM A53 is a carbon steel pipe specification, not a coating standard. It defines:

  • Pipe material (carbon steel)
  • Manufacturing type (seamless or ERW)
  • Dimensions (NPS, wall thickness, SCH 40 / SCH 80)
  • Mechanical and pressure-related properties

 It does not define zinc coating or galvanizing requirements.

 A153 is NOT a pipe standard

ASTM A153 is a hot-dip galvanizing coating standard, not a pipe specification. It applies to:

  • Bolts
  • Nuts
  • Washers
  • Small steel hardware

Its purpose is to specify zinc coating thickness and corrosion protection, not pipe dimensions or pressure ratings.

Article source: https://article-realm.com/article/Business/83679-ASTM-A53-ASTM-A153-and-ASTM-A123.html

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https://www.permanentsteel.com
Permanent Steel Manufacturing Co.,Ltd have years of experience in manufacturing of carbon steel pipe, stainless steel tube, hollow section, pipe fittings.(Fluid Pipe/Boiler Tube/Fire Pipe/Line Pipe/Structure Tube) Please refer to: https://www.permanentsteel.com

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