Steel Pipe Supplier in Patna — ERW, Seamless, GI & Boiler Tubes

Patna is the Bihar capital and a Kanpur-dispatch service area for Bihar buyers. RP Sales quotes Patna-area RFQs from the Kanpur stockyard: ERW and structural to IS 1239 / IS 3589, seamless to ASTM A106 / A53, GI to IS 1239 in the class the approved BOQ writes, and boiler tubes in SA192 / SA210 / SA213 when the mill or plant drawing names those grades. Loads leave Kanpur on the NH-19 / NH-922 corridor. Transit, tax, freight, documents, and the committed date are written on the quotation. This page does not publish a two-day arrival, a 10 AM cutoff, or a standing IBR form on every boiler-grade line.

On-the-ground in Patna — buyer pockets, not customer lists

Four greater-Patna pockets show up on RFQs. Patliputra Industrial Area on the western edge is the engineering and fabrication base — workshops feeding government tenders and small-OEM work write IS 1239 ERW and hollow sections; copy the class from the award. Bihta Industrial Area further west along NH-19 is the newer growth pocket — chemical, packaging, and light-engineering tenants write ERW, GI, and occasional stainless or cold-drawn tubes against their own drawings. Hajipur Industrial Area on the north bank across the Mahatma Gandhi Setu serves the Hajipur–Sonepur corridor with light-engineering and warehousing build-out. Treat those estates as drop geography.

Repeat RFQ types, not named customers: power-plant maintenance contractors writing SA192, SA210, and SA213 against a shutdown window; Patna PWD and BMC water-supply contractors ordering ISI-marked IS 1239 GI in the class named by the approved BOQ, plus IS 3589 large-diameter ERW for trunk-main and last-mile work; contractors writing ASTM A106 and alloy P11 / P22 against a plant specification; and Champaran sugar-belt mills — Riga, Bagaha, Lauriya, Narkatiaganj — writing SA210 and SA213 replacements against a crushing-season calendar. Smart City-adjacent structural contractors write hollow sections when the streetscape BOQ names them. This page does not claim a supply relationship with NTPC Barh, Bihar State Power Holding Company, BMC, or any named mill. Freight is quoted for the actual load and PIN code. Dedicated-truck versus part-load is a quote field, not a published band.

Products we quote for Patna-area RFQs

The families below are quoted when the Bihar BOQ names them. Availability is confirmed on the quotation.

• MS ERW Pipes & Tubes — IS 1239 / IS 3589 / ASTM A53 Type E for structural, water-supply, and fabrication work when the design names that family. View ERW range →
• Seamless Steel Pipes — ASTM A106 Gr B, A53 Type S, alloy-steel P11 / P22 when the approved process design names those grades. View seamless range →
• GI Pipes — IS 1239 hot-dip galvanised in the class the approved Jal Nigam, BMC, or plumbing BOQ writes. View GI range →
• Boiler Tubes — SA192, SA210 Gr A1/C, SA213 T11/T22 when the mill or plant drawing names those grades. View boiler tubes →
• Precision & Hydraulic Tubes — EN 10305, DIN 2391 cold-drawn for Bihta light-engineering drawings. View precision range →
• Drill & Borewell Pipes — IS 4270 / IS 1239 when the well drawing names the standard and class. View borewell pipes →

Sizes that show up on Patna RFQs

The table is a size prompt. Class and product family stay on the approved BOQ. This page does not recommend Heavy class for government work or Medium class for BMC lines.

Buyer work we quote around Patna

These are service-area work types, not a claim that RP Sales supplies the named establishments.

• Power and thermal maintenance — contractors writing SA192 / SA210 / SA213 or A106 / A335 against a plant specification and an inspection plan.
• Sugar and distillery — Champaran-belt mills writing boiler and steam-line replacements against a crushing-season calendar.
• Government and water supply — PWD, BMC, Jal Nigam, and PHED contractors taking ISI-marked IS 1239 / IS 3589 when the approved BOQ names the class and the ISI evidence.
• Streetscape and real estate — structural hollow sections and ERW for public-realm and tower work when the project BOQ names them.
• Industrial estates — Patliputra, Bihta, and Hajipur tenants pulling fabrication-grade ERW, precision tubes, and process-piping seamless against their drawings.

Dispatch from Kanpur toward Patna

Loads move from the Kanpur stockyard on NH-19 and NH-922. The quotation states the carrier, the drop PIN code, and the committed date. This page does not publish a 10 AM cutoff, a same-day load rule, a two-day arrival, or a multi-driver overnight promise. Multi-drop sequencing is quoted when the RFQ asks for it.

Documents named on the order

Bihar government and PSU-linked audits are exacting. List the file on the RFQ. Nothing below is a standing attachment on every Patna consignment.

• Original Mill Test Certificates — chemical and mechanical — against the grade specification on the order, when the order asks for them.
• IBR paperwork classified by component: Form III-A for steam pipes, Form III-B for tubes, Form III-C only for boiler mountings and fittings, and only when the approved inspection plan / authority names that form.
• Delivery challan with weighment-bridge slip for tonnage reconciliation.
• Tax-compliant e-way bills and GST invoices addressed to the buyer Bihar GSTIN, with tax as stated on the current quotation.
• ISI marking certificate copies for IS 1239 / IS 3589 lots when the PWD or Jal Nigam handover file names them. See full quality documentation →

How to order from Patna

1. Send the BOQ — pipe type, grade, size (NB / OD), wall or schedule, quantity, documents, and the Patna delivery PIN code.
2. Ajay or Ayush replies with a quotation once the RFQ has enough fields to price, including freight for that PIN. Reply timing is confirmed when we acknowledge the RFQ.
3. Approve and issue a Purchase Order. For boiler tubes, repeat the heat-number and inspection-plan fields on the PO.
4. We dispatch from the Kanpur yard on the carrier plan written on that acknowledgement.

Trust signals

RFQ checklist for Patna buyers

PWD, BMC, and plant-maintenance vendors lose the most time to a missing grade and a missing heat list. Send the seven lines below with your RFQ.

• Size in NB plus OD in mm. Tenders list 50 NB while site teams measure 60.3 mm OD. State both and the mismatch risk disappears.
• Class, wall or schedule. Copy the IS 1239 class or IS 3589 wall directly from the approved Jal Nigam, BMC, or PWD BOQ; there is no universal Heavy or Medium recommendation. State the exact wall or schedule from the approved design for A106 and P11 / P22 seamless.
• Grade and standard. IS 1239 / IS 3589 for ERW and water mains, A106 Gr B for process piping, SA192 / SA210 / SA213 where the approved design names those grades.
• Length and end finish. State the mill length or the bevel. Bevelled ends suit butt-welded boiler and process spools when the drawing names them.
• Coating. Hot-dip GI, red-oxide primer, or bare black as the approved design and corrosion data require.
• Test paperwork. List MTC, heat-number traceability, ISI copies, and IBR forms on the RFQ. Classify IBR items as steam pipe (Form III-A), tube (Form III-B), or mounting/fitting (Form III-C) and defer the issued form to the approved inspection plan.
• Delivery basis. Ex-warehouse Kanpur plus freight to the Patna PIN code, with tax as stated on the current price list and quotation. Confirm dedicated truck or consolidation. Track Kanpur steel market movement with the quote.

Receiving a Patna-bound lot

Match heat numbers on the stencil to the MTC before the Patliputra shop or the site store signs the challan. On GI, reconcile the weighment slip to the invoice weight, not to a theoretical black-steel mass. On water-supply lots, keep ISI copies with the handover file if the BOQ named them. Reject class substitution at the gate: a Light bundle cannot close a Medium line item.

Payment terms are not published here. If the PO and the acknowledgement disagree on class, documents, or date, stop the load in Kanpur rather than arguing on the Mahatma Gandhi Setu approach after the night run.

Worked example: tonnage check on a water-supply order for Patna

Take a distribution order where the approved BOQ specifies 250 lengths of 50 NB GI written as Medium class, each 6 m long. The site formula W = (OD minus t) x t x 0.02466 kg/m uses the black-steel substrate dimensions. Using OD 60.3 mm and wall 3.6 mm — the pair stored in the site pipe-weight table for this worked example, not a displayed chart mass — gives 5.03 kg/m and 30.2 kg per 6 m length. Multiplying 250 by 30.2 gives 7,550 kg, or 7.55 MT, as a theoretical black-steel substrate mass, not the coated GI bundle mass. The site note says galvanizing typically adds roughly 3 to 6 percent mass; use the coated-bundle or invoice weight from the supplier for billing without inventing one exact coated value.

A second compatible Patna drop may make a dedicated truck, but the carrier allocation, coated mass, destination sequence, and handling still need a current quotation. Do not apply a published per-kilogram band from this page. Put the estimated substrate mass on the RFQ, then reconcile the actual coated-bundle or invoice weight from the supplier and the quoted freight basis before raising the PO.

FAQ