Ruby Infra Projects manufactures and supplies stainless steel seamless tubes (grades 304, 304L, 316, 316L, 321 and more), Incoloy and other high-temperature alloy tubes, power plant and boiler spares such as half round tube shields, bend shields, protective sleeves and cassette baffles in every grade, precision and automotive stainless steel components, and structural and architectural metal products such as railings, balusters, cladding and enclosures. See the full product range.
The works are at Plot No. 131, Survey No. 171/P & 172/P, GIDC Umbergaon, Valsad, Gujarat 396171, India. Umbergaon is an industrial estate in Valsad district in southern Gujarat. Contact details are on the contact page.
Yes. Ruby Infra Projects operates an ISO 9001:2015 certified quality management system for manufacturing and supply. It is also GST registered, registered as a micro enterprise under MSME Udyam, and licensed under the Factories Act, 1948. Details are on the certifications page.
Ruby Infra Projects supplies power generation companies, EPC contractors, real estate developers and industrial clients in India and overseas, from boiler pressure-part protection components to large architectural stainless steel enclosures.
Yes. Ruby Infra Projects supplies customers outside India as well as within India, and holds an Import Export Code (IEC). Send the product, grade, applicable standard, size range, quantity, destination country or port and your preferred shipping terms (for example FOB or CIF), and the team will confirm availability, lead time and a quotation. Use the enquiry form, email samay@rubyinfra.in or message on WhatsApp.
Yes. Ruby Infra Projects holds an Import Export Code (IEC), the registration issued by India's Directorate General of Foreign Trade (DGFT) that Indian businesses need to export goods. It sits alongside the company's ISO 9001:2015 certification, GST registration and MSME Udyam registration. See certifications.
Send these details through the enquiry form, by email or on WhatsApp: material grade (for example 304L or 316L), applicable standard (for example ASTM A213, A249, A269 or A312), outside diameter, wall thickness and length, quantity, surface finish, the test certificate you need, and the delivery location. A complete specification lets the team quote faster.
Yes. Material test certificates from Government or NABL-accredited laboratories are provided on every batch. When you request a quote, state the certificate format your project or inspector requires.
Yes. Custom specifications and cut-to-length services are available, backed by in-house cutting, forming, machining, welding and finishing. See capabilities.
In-house sheet cutting, bending, rolling and grooving of mild steel and stainless steel is available up to 4 mm thick.
Contact Samay Sanghvi on +91 93163 23342 or at samay@rubyinfra.in. The website is www.rubyinfra.in.
Both are austenitic stainless steels. Grade 304 contains roughly 18–20% chromium and 8–11% nickel and suits general corrosion resistance. Grade 316 adds about 2–3% molybdenum, which gives much better resistance to chlorides and pitting, so it is preferred for marine, coastal, chemical and process environments. 316 costs more than 304. Read the 304 vs 316 article.
The L stands for low carbon, with carbon limited to about 0.03–0.035%. Low carbon reduces chromium carbide formation at welds (sensitisation), which protects against intergranular corrosion in welded or heat-exposed service. Dual-certified 304/304L and 316/316L material is common.
Grade 321 is titanium-stabilised austenitic stainless steel. The titanium ties up carbon so the steel resists intergranular corrosion after exposure to roughly 425–850 °C, which is why it is used in high-temperature piping, exhaust and heat-exchanger service.
Seamless tubes are made from a solid billet pierced and drawn or rolled to size, so they have no weld seam. Welded tubes are formed from strip or plate and welded longitudinally, then usually annealed and sized. Seamless tube is typically chosen for higher pressure and critical boiler or heat-exchanger duty; welded tube is economical for general, structural and architectural use. See the seamless vs welded article.
A pipe is specified by nominal pipe size (NPS) and schedule and is used mainly to carry fluids. A tube is specified by its actual outside diameter and wall thickness, with tighter dimensional tolerances, and is used for heat exchangers, boilers, instrumentation and structural applications.
ASTM A213 covers seamless ferritic and austenitic alloy-steel boiler, superheater and heat-exchanger tubes. ASTM A249 covers welded austenitic steel boiler, superheater, heat-exchanger and condenser tubes. ASTM A269 covers seamless and welded austenitic stainless steel tubing for general service. ASTM A312 covers seamless, welded and heavily cold-worked austenitic stainless steel pipe. See the standards explained.
Both are cold-working processes that reduce a seamless tube to final size and improve dimensional accuracy and surface finish. In cold drawing the tube is pulled through a die over a plug or mandrel. In cold pilgering shaped rolls and a mandrel progressively reduce the tube, achieving large reductions with tight tolerances.
Pickling removes heat tint and oxide scale left by hot working and welding. Passivation then restores the thin, chromium-rich oxide film that gives stainless steel its corrosion resistance. Cleaning and passivation practice is commonly specified under ASTM A380 and ASTM A967.
Incoloy is a trademark of Special Metals for a family of nickel-iron-chromium alloys, such as Incoloy 800, 800H and 800HT. They resist oxidation and carburisation at high temperature and are used in furnaces, heat exchangers, petrochemical processing and other high-temperature equipment.
A mill or material test certificate records the chemical composition and mechanical test results of a specific batch (heat) of material, so that its grade and compliance can be verified. Buyers often ask for certificates in EN 10204 type 3.1 format. State the format you need when requesting a quote.
They are stainless steel shields fitted over boiler tubes, especially at bends and in zones exposed to erosive flue gas. They take the wear in place of the pressure-part tube, so worn shields can be replaced instead of the tube. Ruby Infra Projects makes bend shields, half round tube shields and protective sleeves in every grade for thermal power stations. See boiler tube protection shields, half round tube shields and the boiler spares article.
Yes. Ruby Infra Projects manufactures half round tube shields (half round boiler shields) in every grade — for example SS 304, 304L, 309 (Cr23Ni13), 310, 316 and 321 — to your drawing, sketch or sample. See half round tube shields.
In coal-fired boilers, fast-moving fly ash in the flue gas erodes tube surfaces, and soot-blower steam can add local wear. Thinned tubes can leak or fail, causing forced outages. Sacrificial shields spread and absorb the abrasion at known hot spots, extending the life of the pressure parts.
Grade 310 stainless steel contains about 24–26% chromium and 19–22% nickel. This high alloy content gives strong resistance to oxidation and scaling at very high temperatures, well above what 304 can handle, so it is chosen for hot gas-path components.
Baffles are plates fitted in the flue-gas path to direct gas across tube banks and limit bypass, so heat is transferred more evenly. Cassette baffles are fabricated as replaceable panel units, which makes them quicker to install or change during a shutdown.
Grade 304 is widely used indoors and in mild outdoor environments. For coastal, marine or chloride-rich locations, and where de-icing salts or pool chemicals are present, grade 316 is the safer choice because molybdenum improves pitting resistance.
A mirror finish is produced by progressive grinding and buffing to a highly reflective surface. A satin or matt finish is a directional brushed texture that hides fingerprints and light scratches better. Both are available on stainless steel railings and cladding. See capabilities for in-house polishing.