By Ajay Jaiswal · IS · 28 yrs
Reviewed byAyush Jaiswal·

Galvanized iron (GI) pipes are the backbone of water supply and plumbing infrastructure across Uttar Pradesh and North India. From municipal water distribution to fire-fighting risers and building plumbing, GI pipes deliver corrosion resistance and long service life at a competitive cost. RP Sales is a leading GI pipe stockist in Kanpur, maintaining ready inventory of IS 1239 light, medium, and heavy class pipes with hot-dip galvanizing conforming to IS 4736.

On-the-ground in Kanpur — where our GI pipes actually land

Kanpur GI demand is not a single market — it splits by area and use-case. Plumbing contractors working the residential build-out around Swaroop Nagar, Civil Lines, Kakadeo and the GT Road corridor take Class B (medium) GI in 1/2"–1" NB by the bundle for risers and apartment-floor distribution; fire-fighting risers and wet-riser lines in the new commercial towers along Mall Road and the airport-side Rave Moti axis run on Class C (heavy) GI sized 2"–4" NB, because the Kanpur Nagar Nigam building-byelaws and NBC 2016 will not accept anything lighter on a pressurised water line. Panki and Dada Nagar industrial estates pull Class B GI for compressed-air ring-mains and utility water — the kind of inventory that turns over fast at our stockyard. Jajmau's tannery cluster takes a steady stream of Class C GI for ETP-side utility water and freshwater feeds where the chlorine load on the line favours galvanised over bare carbon steel.

Intra-Kanpur logistics is essentially yard-to-site on a same-shift basis — Panki around 12 km, Dada Nagar 8 km, Jajmau 10 km, Civil Lines 4 km from the Bartan Bazar stockyard. Many of the plumbing-contractor buyers prefer direct yard pickup against challan rather than a delivery slot; they roll in with a 407 or a Tata Ace and are out in under an hour with the MTC and ISI-marking certificate in the file. Site delivery for full-truckload orders happens same-day inside city limits with no separate freight line on the invoice — we roll the last-mile rate into the per-kg quote. Payment terms vary: established plumbing-contractor accounts run on 15-day post-invoice credit once two cycles are cleared; first-time accounts run on PI / advance; PWD and Jal Nigam-empanelled contractors run on work-order running-bill cycles with the ISI-marking certificate copy attached to every invoice because the divisional engineer checks for it during measurement-book verification.

GI Pipes vs MS (Black) Pipes

GI pipes are zinc-coated ERW pipes manufactured to IS 1239 and galvanized per IS 4736. They resist corrosion and are mandatory for potable water lines. If your application does not require galvanizing — such as structural fabrication, scaffolding, or oil lines — you may find better pricing on our MS ERW pipe page instead.

Grades and specifications we supply

We stock and source hot-dip galvanized pipes across the full range of standards used in Indian water supply, plumbing, and construction procurement:

  • IS 1239 Part 1— Light, Medium & Heavy class ERW pipes for water, gas, and general engineering (the primary Indian GI pipe standard).
  • IS 4736 — Hot-dip zinc coating specification for IS 1239 pipes, which requires minimum coating thickness of 300 g/m² for heavy class.
  • ASTM A53 Type E Gr B (Galvanized) — internationally specified galvanized ERW pipe for export projects and MNC sites.
  • BS 1387 — British standard galvanized tubes, light/medium/heavy, often specified in government and institutional projects.
  • Sizes: 15 NB (½") to 150 NB (6") in standard 6-metre running lengths.

How wholesale pricing works for GI pipes

GI pipe pricing is driven by the base HR coil price, zinc cost, class (light/medium/heavy), and order volume. Our wholesale pricing is transparent and volume-dependent — the more you order, the better your per-kg rate.

  • Prices are quoted per kilogram or per metric ton (MT).
  • Light, medium, and heavy class rates quoted separately — no hidden class upcharges.
  • Significant freight savings on full truckloads (9 MT to 20 MT).
  • See our MS & GI pipe price list for indicative rates updated weekly.

Delivery zones from Kanpur

Our strategic location in Kanpur allows us to dispatch GI pipes rapidly across Northern and Central India. We partner with specialized steel haulage fleets to ensure pipes arrive bundled and undamaged.

Same Day Dispatch:
Uttar Pradesh, Delhi NCR, Northern MP.
Next Day Dispatch:
Bihar, Jharkhand, Rajasthan, Haryana.

Quality certifications we issue

Traceability and ISI compliance matter in government and institutional GI pipe procurement. For every dispatch, we supply full documentation to protect you during inspections and ensure regulatory compliance.

  • Original Mill Test Certificates (MTC) stating chemical & mechanical properties.
  • Galvanizing thickness certificate — zinc coating weight per IS 4736.
  • Tax-compliant e-way bills and GST invoices.

How to place an order

  1. Send us your requirement list — NB size, class (light/medium/heavy), quantity, and delivery pin code.
  2. Our technical sales team (Ajay or Ayush) will reply with a detailed quotation within 2 working hours.
  3. Approve the quotation and issue a Purchase Order (PO).
  4. We dispatch the material from our Kanpur stockyard and provide live tracking details.

Trust signals

30+ Years ExperienceMTC on every orderISI-marked GI Pipes

Most-Ordered GI Sizes

Popular GI pipe sizes ordered in Kanpur
SizeOD (mm)TypeStandard
1/2" NB21.3GI LightIS 1239 Class A
1" NB33.7GI MediumIS 1239 Class B
1.5" NB48.3GI HeavyIS 1239 Class C
2" NB60.3GI MediumIS 1239 Class B

FAQ

What GI pipe classes does RP Sales stock in Kanpur?
We stock all three IS 1239 classes — Light (Class A), Medium (Class B), and Heavy (Class C) — in sizes from NB 15mm to NB 150mm. Heavy Class is mandatory for fire fighting and pressurized water supply per NBC 2016. All pipes carry ISI marking with hot-dip galvanizing per IS 4736.
What is the zinc coating thickness on your GI pipes?
Minimum 300 g/m² for Heavy Class, 270 g/m² for Medium Class, and 220 g/m² for Light Class per IS 4736. We can provide galvanizing thickness test certificates and uniformity reports on request.
Can you supply threaded and coupled GI pipes?
Yes. All our GI pipes come threaded and coupled as standard per IS 1239 Part 1. We also supply plain-end and grooved-end options for specific applications. Socket and nipple fittings available alongside.

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