Khodal Enterprise

GALVANIZED STEEL PIPES 1. Scope

This specification covers the manufacture, supply, inspection, testing, packing, and delivery of hot-dip galvanized mild steel pipes intended for use in water supply, plumbing, firefighting, structural, and general engineering applications.

2. Applicable Standards

Galvanized steel pipes shall conform to one or more of the following standards, as specified in the purchase order:

• ASTM A53 / A53M – Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated

• BS 1387 – Steel tubes and tubulars suitable for screwing

• IS 1239 (Part 1 & 2) – Mild Steel Tubes, Tubulars and Other Wrought Steel Fittings

• ISO 65 – Carbon steel tubes suitable for screwing

Equivalent international standards may be accepted subject to approval.

3. Material

Pipes shall be manufactured from mild steel produced by electric resistance welded (ERW) or seamless process. The steel shall be free from laminations, cracks, surface defects, and other imperfections that may affect performance.

4. Dimensions and Sizes

• Nominal Bore (NB): 15 mm to 300 mm (½" to 12")

• Length: Random length 5–7 m or fixed length 6 m, unless otherwise specified

• Outside Diameter and Wall Thickness: As per applicable standard

• Tolerance: As per relevant standard requirements

5. Galvanizing

Pipes shall be hot-dip galvanized both internally and externally after fabrication in accordance with ASTM A123 / A153 or equivalent.

• Minimum Zinc Coating:

  • Average coating mass ≥ 275 g/m²

• Coating shall be uniform, smooth, continuous, and firmly adherent.

• Free from flaking, peeling, bare spots, blisters, and excessive ash.

1. Product Description

Pipe hangers are mechanical support devices used to suspend, secure, and support pipelines from ceilings, beams, or structural members. They ensure proper alignment, load distribution, vibration control, and thermal movement accommodation in piping systems.   

2. Material

• Mild Steel (MS)

• Carbon Steel

• Stainless Steel (Optional)

• Finish: Black, Hot Dip Galvanized, Electro-Galvanized

3. Types of Pipe Hangers

• Clevis Hanger

• U-Bolt Hanger

• Split Ring Hanger

• Adjustable Swivel Ring Hanger

• Rigid / Non-Rigid Hanger

• Spring Hanger (Constant / Variable)

4. Size Range 5. Load Capacity

• Light Duty, Medium Duty, Heavy Duty

• Load ratings as per design, pipe size & material

• Designed with suitable safety factor

6. Applicable Standards

• MSS SP-58

• MSS SP-69

• MSS SP-89

• ASME B31 (as applicable)

• IS standards (where applicable)

7. Manufacturing Process

• Cutting, forming & machining of steel components

• Welding as per approved WPS

• Galvanizing / surface treatment

• Assembly & quality inspection

8. Surface Finish

• Black / Self Finish

• Hot Dip Galvanized (HDG)

• Zinc Plated / Powder Coated (Optional)

9. Testing & Inspection

• Dimensional Inspection

• Visual Inspection

• Load Testing (on request)

• Coating Thickness Test (for GI/HDG)

10. Installation Features

• Adjustable height for alignment

• Easy installation & maintenance

• Suitable for horizontal & vertical piping

11. Applications

• HVAC & Plumbing Systems

• Fire Fighting Pipelines

• Industrial & Process Piping

• Water Supply & Drainage

• Power Plants & Refineries

12. Packing

• Packed in Cartons / Wooden Boxes

• Loose or Bundled Packing

• As per customer requirement