Stockist & supplier IS 1239 (Part 1) · IS 3589 · IS 4736
GI Pipes — IS 1239 & IS 3589 Galvanised
GI pipe is steel pipe protected by a hot-dip zinc coating against corrosion. Teshi Group stocks and supplies galvanised pipe to IS 1239 Part 1 (Light, Medium and Heavy class) and IS 3589, plain-ended or screwed and socketed. Quotes are sent in 24–48 hours.
Also called: galvanised iron pipe, galvanized steel pipe, IS 1239 GI pipe, hot-dip galvanised pipe
What is a GI Pipe?
GI (galvanised iron) pipe is carbon steel ERW pipe dipped in molten zinc so that the inside and outside surfaces carry a zinc coating. The zinc corrodes in preference to the steel, protecting it in water and outdoor service. In India, smaller sizes are made to IS 1239 Part 1 in Light (A), Medium (B) and Heavy (C) classes, and larger sizes to IS 3589; galvanising of tubes follows IS 4736. GI pipe is used for potable and process water, fire-fighting, plumbing, fencing and light structural work.
Key features
- Stockist and supplier — sourced from tube mills; Teshi does not manufacture pipe
- Hot-dip galvanised inside and outside
- IS 1239 Part 1 Light, Medium and Heavy classes
- Plain ends or screwed and socketed (threads to IS 554)
- IS 3589 galvanised pipe for larger diameters against order
- Supplied with threaded fittings and flanges manufactured by Teshi when needed
Specification
| Supply | Stockist & supplier — Teshi Group, India, India |
|---|---|
| Standards | IS 1239 (Part 1), IS 3589; galvanising per IS 4736 |
| Size range | IS 1239 Part 1: nominal bore 6–150 mm; IS 3589 for larger sizes against order |
| Classes | Light (A), Medium (B), Heavy (C) to IS 1239 |
| Ends | Plain, screwed and socketed (IS 554 threads) |
| Coating | Hot-dip zinc coating, inside and outside |
| Testing | Hydrostatic test and coating checks per the standard |
| Documents | Mill test certificate; EN 10204 3.1 / third-party inspection when the order specifies |
Applications
- Potable and service water lines
- Fire-fighting and sprinkler systems
- Plumbing in buildings and plants
- Fencing, railings and light structures
- Agricultural and irrigation lines
Technical data sheets
Dimensions & weights
FAQ
GI Pipe: common questions
What do Light, Medium and Heavy class mean in IS 1239?
They are wall-thickness classes for the same nominal bore. Heavy (C) has the thickest wall and highest pressure capacity, Medium (B) is the usual choice for water and fire lines, and Light (A) is used for low-pressure and non-critical service.
Can GI pipe be welded?
It can, but welding burns off the zinc at the joint and produces zinc fumes. GI pipe is normally joined by threading or grooved couplings; if welded, the joint must be re-coated and fume protection used.
Is GI pipe suitable for gas or steam?
GI pipe is mainly used for water and air. Galvanised pipe is generally not used for steam or high-temperature service. Follow your project specification. For steam, carbon steel seamless or ERW pipe to ASTM A106 or A53 is normally specified instead.
Does Teshi manufacture GI pipe?
No. Teshi Group is a stockist and supplier of GI Pipe, sourced from established mills and supplied with the original mill test certificate. Teshi is an OEM manufacturer of flanges, fittings, fasteners, valves and custom fabrications, which can be ordered with it.
Need a size or grade not listed here?
We source against your specification from approved mills, with mill test certificates and inspection before dispatch.
Send us your specificationTraceability
From mill heat to your site
- 01
Approved mill material
Received against the mill certificate; heat number registered.
- 02
Forging & machining
Heat number carried through every stage in our Indian works.
- 03
PMI, dimensional & NDT
Every lot inspected to the governing standard; TPI witness on request.
- 04
Stamped & certified dispatch
Hard-stamped pieces with EN 10204 3.1 / 3.2 certificates.
Quick RFQ
Quote for GI Pipe in 24–48 hours
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