Stainless Steel Pipes & Tubes

About SS Pipes

Austenitic stainless-steel pipe and tube options in grades including 304, 304L, 316, 316L, 321 and 347. Product form, grade, finish, and service suitability require a project-specific corrosion and design review.

Use this page as a product and specification reference. The quotation must state the exact material grade, dimensions, manufacturer, certification or document scope, inspection, quantity, price, current availability, freight, and proposed delivery timing for the specific RFQ.

Specification reference

Confirm the exact grade, dimensions, tolerance, test certificate, and current availability for your requirement before ordering.

Common applications

These are enquiry contexts, not universal approvals. The project design and governing specification must approve the exact product, grade, dimensions, and service conditions.

• Chemical Processing: Acid lines, reactor piping, process distribution.
• Pharmaceutical & Food: Hygienic piping, CIP systems, clean-room process lines.
• Heat Exchangers: Condenser tubes, superheater tubes, boiler tubes.
• Oil & Gas: Offshore platforms, subsea piping, sour-service applications.

Potential source references

The quotation must identify the proposed manufacturer, current availability, inspection documents, and delivery basis for the specific RFQ.

• Salem Steel Plant (SAIL)
• Jindal Stainless
• ISMT Limited
• Ratnamani Metals

Applicable standards and specifications

• ASTM A312
• ASME SA213

Technical Definition, Metallurgy, and Governing Specifications

Stainless steel pipes and tubes are ordered where the service, cleaning method, product-contact requirement, or surrounding environment calls for a corrosion-resistant alloy. The purchase description should distinguish pipe from tube, seamless from welded construction, and commercial finish from a controlled internal-surface finish. Those details affect dimensions, inspection, fabrication, and price.

ASTM A312 covers seamless and welded austenitic stainless-steel pipe, while ASTM A213 and ASTM A269 cover different tube scopes. The order should name the current project-required edition, grade, manufacturing route, heat treatment, dimensions and tests. Heat-treatment requirements differ by grade, product form and specification; do not apply one solution temperature or cooling route to every stainless item.

Service Environments and Material Compatibility

Selecting the appropriate stainless steel grade requires evaluating fluid composition, concentration, temperature, chlorides, cleaning chemistry, fabrication, and the approved corrosion allowance. TP304 and TP316 are common austenitic options, while their low-carbon variants may be selected for welded fabrication when the governing specification and corrosion review require them. Molybdenum-bearing TP316 can improve resistance to localised corrosion in some chloride environments, but a city, industry, or service label does not make it universally mandatory.

Do not select a grade from a broad label such as food, chemical, tannery, or high temperature. Confirm fluid composition, concentration, temperature, cleaning chemicals, chlorides, fabrication method, weld treatment, and contamination controls with the process or materials engineer. Carbon steel or another alloy may be the specified choice for some non-corrosive services; a stainless substitution still needs written design approval.

Technical Stainless Steel Pipe Wall Thickness Chart

Repository dimensional rows for preliminary stainless pipe comparison. Confirm the applicable standard, schedule, tolerances, and certified dimensions for the offered product.

These repository dimensions support preliminary size and mass checks. Confirm the applicable dimensional standard, schedule, manufacturing tolerance, and certified measurements for the offered pipe.

Worked Weight Sizing and Procurement Calculation

To illustrate a practical material takeoff, let us calculate the weight of a piping order for a dairy processing plant near Chakeri, Kanpur. The BOQ specifies 120 lengths of 2" NPS Schedule 10S seamless stainless steel pipe, grade TP316L, with each pipe having a standard length of exactly 6.0 meters.

First, the procurement engineer identifies the outer diameter (OD) and wall thickness (t) for 2" NPS Sch 10S from our dimensional chart:

OD = 60.33 mm, t = 2.77 mm.

The engineer calculates the unit weight per meter using the standard steel weight formula:

Weight (kg/m) = (OD - t) * t * 0.02466

Calculation: Weight = (60.33 - 2.77) * 2.77 * 0.02466 = 57.56 * 2.77 * 0.02466 = 159.4412 * 0.02466 = 3.9318 kg/m.

Next, the total linear length of the order is computed:

Total Length = 120 lengths * 6.0 meters/length = 720 meters.

Finally, the total tonnage of the stainless steel payload is calculated:

Total Weight = 720 meters * 3.9318 kg/m = 2,830.9 kg (or approximately 2.83 Metric Tons).

Use the result for a preliminary material takeoff. Vehicle selection and invoicing still depend on the supplier's confirmed mass basis, packing, bundle geometry, actual payload, and route constraints.

Common Procurement Mistakes and Failure Modes

Stainless orders can become incomplete when grade identity, surface condition, or post-weld treatment is left undefined:

• Grade shorthand: Copy the complete grade and product standard from the line class. If a low-carbon or stabilized grade is required for fabrication, keep the suffix in the enquiry, order, tags, and cut-piece identification.
• Finish left open: Define pickled, passivated, bright annealed, polished, or other finish as the project requires. Also state any internal-surface acceptance, end protection, or cleanliness requirement.
• PMI assumed rather than ordered: If positive material identification forms part of project acceptance, state the sampling plan, acceptance method, report format, and witness point in the RFQ. The quotation must confirm whether that inspection is included.

Kanpur Steel Market Pricing Mechanics & Regional Delivery Basis

A comparable stainless quotation identifies grade, standard, manufacturing route, size, schedule or wall, finish, length, quantity unit, commercial mass basis, proposed mill, and certificate scope. Ask suppliers to separate cutting, polishing, testing, PMI, packing, freight, and taxes instead of comparing only the material rate.

For Jajmau, Panki, Unnao, another Kanpur-area site, or a longer route to Lucknow, Agra, Prayagraj, Varanasi, Gorakhpur, Jhansi, Bareilly, Patna, or elsewhere, share the delivery PIN code and handling limits. Require the quotation to state current availability, proposed loading date, transport responsibility and the basis of any transit estimate.

Agree the document pack in the order. It may include the invoice, e-way bill, packing list, MTC, heat list, finish report, and inspection release. PMI is an on-demand inspection: include it in the RFQ when required and agree the sampling, reporting, marking, and witness arrangements before loading.

Standards and Regulatory Compliance

The order should identify the governing product standard and edition, grade, manufacturing route, heat treatment, dimensions, finish, testing route, and supplementary requirements. Hydraulic or nondestructive examination requirements must come from the applicable primary standard and project specification. This page does not assign a universal test stress to A312 pipe; ask the supplier to state the test method and report included with the offered batch.

Key Takeaways for Kanpur SS Pipe Sourcing

A summary of procurement rules of thumb for tanneries, chemical plants, and food processors in North India:

• Proposed source: Ask the quotation to identify the offered mill from the supplier list and confirm whether the material is stock or mill supply.
• Heat treatment and finish: Copy the applicable requirements from the material specification and ask the MTC or finish record to show the ordered condition.
• PMI verification: Request PMI when required and define the sampling and reporting scope; it is included only when the order confirms that inspection.
• Dispatch planning: Give the exact delivery point and handling restrictions so availability and transit can be confirmed for the order.

Stainless receiving, segregation, and fabrication handoff

Use a receiving sheet that identifies the project line, grade, product standard, size, wall or schedule, manufacturing route, finish, length, and ordered documents. Compare bundle tags and pipe markings with the packing list and MTC before removing identification. If material from several grades arrives together, create separate quarantine and accepted areas before unloading begins.

Inspect end protection, surface condition, dents, scratches, embedded contamination, weld appearance where visible, and moisture damage to documents or packaging. Use clean handling equipment required by the project contamination-control plan. Record any damaged item against its heat or bundle reference rather than relying on an unlabelled photograph.

Before fabrication, transfer identity to cut pieces under the workshop procedure and keep remnants segregated by grade. Confirm filler material, welding procedure, purge, cleaning, pickling, passivation, and final inspection from the approved fabrication documents. A receiving-yard grade check cannot replace those project controls.

Agree packaging and handling controls for the finish being purchased. Polished or cleaned bore surfaces may need caps, sleeves, or wrapping that ordinary mill-finish pipe does not. If wooden supports, straps, markers, or desiccants are restricted by the project, put that requirement in the RFQ rather than correcting the pack after arrival.

For a Kanpur fabrication shop, map each received heat and length to the spool or work order before cutting begins. Record approved substitutions separately and keep a clear remnant register. Final cleaning and inspection records should follow the fabricated spool, while the original MTC and receiving record stay in the project dossier.

• Send a stainless pipe RFQ Include grade, standard, route, dimensions, finish, quantity, PMI or inspection scope, and destination.
• Estimate stainless pipe mass Prepare a material takeoff and freight estimate, then confirm the supplier's commercial mass basis.
• Plan a Kanpur inspection Review local procurement information before collection or inspection.

What to include in the RFQ

1. Specify the relevant standard or grade where known.
2. Provide OD or NB, wall thickness or schedule, required length, and quantity.
3. State the delivery city or PIN code and any unloading constraints.
4. List MTC, IBR, TPI, marking, inspection, or other documentation requirements.

Frequently asked questions