Steel Pipes · Delhi NCR

GI Pipes Dealer & Stockist in Delhi

Galvanised iron pipe is mild steel pipe that has been hot-dip zinc coated, which is why it survives in plumbing, potable water and outdoor exposure where black pipe would rust through. The single most important quality parameter is zinc coating mass — IS 1239 requires a minimum of 400 g/m². Cheap GI pipe in the market often falls well short, and you only discover it two monsoons later. Every ISI-marked pipe we supply comes with a coating test result.

💬 Get a Price on WhatsApp 📞 +91 99996 83666

Stack of hot dip galvanised iron pipes showing the zinc coated bore and yellow class band — GI pipe to IS 1239 — hot dip galvanised, minimum 400 g/m² zinc coating, ISI marked

GI Pipes — sizes, materials and specifications we supply

Specification	Details
Standards	IS 1239 Part 1, IS 4736 for zinc coating, IS 3589 for larger sizes
Sizes	½" (15 mm) to 20" (500 mm)
Class	Medium (B class) and Heavy (C class)
Zinc coating	Minimum 400 g/m² hot dip galvanised, uniform inside and outside
Length	6 metre standard; screwed and socketed both ends available
Marking	ISI mark, brand, class colour band, size and heat number on each pipe
Brands	Jindal Hissar and Jindal Star; other ISI licensed mills to order

Where these are used

Domestic and commercial plumbing, potable water risers, fire hydrant lines, sprinkler distribution, agricultural and irrigation lines, greenhouse structures, outdoor railings and gates, cable protection.

Why buy your GI Pipes from Namokar Enterprises?

We are a Delhi-based stockist, not a broker. That means the material you order is either on our floor in Chawri Bazar or coming direct from the manufacturer against our standing order — so the price you are quoted is the price you pay, and the delivery date you are given is one we control.

Ready stock of common sizes for same-day dispatch in Delhi NCR
Genuine brands only — Sant, Zoloto, Kartar, L&T, Audco, Advance, Jindal
Test certificates and ISI/IBR/UL documentation supplied with the invoice
Written quotations with item-wise rates, GST and freight — usually the same day
Technical help before you order, so you buy the right thing once

Request a Quotation →

Send your requirement

Item list, BOQ, drawing or even a photo of a hand-written list — whatever you have.

GI Pipes — common questions

How do I check whether GI pipe has proper zinc coating?

Look for the ISI mark and ask for the manufacturer's test certificate showing coating mass in g/m² against IS 4736 — it should be 400 g/m² minimum. Visually, a properly galvanised pipe has an even, matte grey finish inside the bore as well as outside; pipes that are bright and shiny only on the outside are usually thinly coated or merely zinc-painted.

Is GI pipe safe for drinking water?

GI pipe has been used for potable water in India for decades and IS 1239 pipe is accepted for the purpose. Over long service the zinc layer eventually depletes and the pipe can contribute rust and taste, which is why many new projects now specify CPVC or stainless steel for potable risers. For fire lines, irrigation and general water service GI remains the practical, economical choice.

Can GI pipes be welded?

They can, but welding burns off the zinc around the joint and creates a corrosion hot spot, and zinc fumes are hazardous. The correct practice for GI is threaded and socketed joints, or grooved couplings, with zinc-rich paint applied to any cut or threaded end.

Need a price today?

Send us your BOQ, drawing or item list on WhatsApp and get a written quotation the same working day. Ready stock for most sizes at our Delhi godown.

💬 WhatsApp Your Requirement 📞 +91 99996 83666