# Stainless Steel Seamless Tubes > Stainless steel seamless tubes in 304/304L, 316/316L—instrumentation, heat exchanger & high purity tubing. ISO certified, Gujarat. Request a quote today. Source: https://avtechtube.com/ ## Establishing Modern Standards in Tube Manufacturing A precision-focused tube manufacturer delivering premium seamless stainless steel tubes for industrial, instrumentation and specialty applications — backed by rigorous process control and international-grade documentation. ### Let's build the future together Collaborations with manufacturers, distributors and end-users worldwide. Custom Tube Development — engineering products tailored to exact mechanical, chemical and dimensional specifications, including bespoke lengths, bends and surface finishes. ### Committed to High Quality *Service* Quality is the cornerstone of our operations — from stringent raw material procurement to meticulous final inspection. Av-Tech Tube Industry is based in the Ahmadabad industrial corridor of Viramgam, Gujarat. We integrate advanced engineering, rigorous process control and a customer-centric methodology to deliver premium tubes. Operating from a strategic logistical hub, we serve both domestic and international markets with reliability, consistency and technical excellence. Our structured processes guarantee consistency, traceability and strict adherence to recognised global standards, with fully certified documentation and testing behind every shipment. To establish a new benchmark in global tube manufacturing by delivering products that exceed international quality standards while offering the agility to support bespoke technical requirements. To be the premier international partner for engineered tube solutions, globally recognized for uncompromising quality, reliability and technical expertise. ### Stainless Steel Seamless Tubes Cold-finished seamless tubes and pipes in straight, corrugated, U-bend and coil form — specified by OD and wall thickness, supplied to ASTM, ASME, EN and DIN standards. #### Seamless Straight Tubes & Pipes Round hollow sections with no longitudinal weld, supplied in straight lengths for piping, heat-exchanger, hydraulic and instrumentation service. #### Seamless Corrugated Tubes Rigid stainless steel tubes with engineered helical corrugations that force turbulence and enhance convective heat transfer by 2 to 3 times. #### Seamless “U” Tubes Precision cold-bent U-tubes for heat exchangers, boilers and instrumentation systems, per ASTM/SA 213 with annealed, pickled or BA finish. #### Seamless Coil Form Tubes Continuous seamless lengths wound into compact coils for instrumentation, hydraulics, chemical processing and oil & gas service. #### Instrumentation Tubing Small-diameter cold-drawn tube with very tight OD and wall tolerances for leak-free compression-fitting joints on pressure and signal lines. #### Heat Exchanger Tubing Cold-drawn seamless tube for shell-and-tube exchangers, condensers and reboilers, in BA or pickled–passivated finish for low fouling. ### Seamless High Purity Tubes Tubing for semiconductor, bioprocessing and hygienic service — electropolished internal surfaces, controlled sulphur chemistry and cleanroom packaging. #### Ultra-High Purity Tubing Ra 0.127–0.25 µm electropolished bore, ASTM A-380 / CGA G4.1 cleaning, Class 4 cleanroom double-bagged and N₂ dried, 3.1 MTR with surface analysis. #### Electropolished Tubing Electrochemical finish removing 10–15 µm for a mirror-bright bore at Ra ≤ 0.25 µm, with an enhanced chromium-rich passive layer. #### Bioprocessing Tubing ASME BPE 316L tube with controlled sulphur 0.005–0.017% for weldability; SF1 mechanical and SF4 electropolished finishes, boroscope inspected. #### Semiconductor Tubing 316L to SEMI F19 / F20 for ultra-pure gas and chemical distribution in wafer fabs, with F60, F72 and F73 surface characterisation. #### Hygienic Tubing ASTM A270 and 3-A polished tube with crevice-free interiors for CIP in food, dairy, beverage and personal care lines; bead-removed welds. #### Passivated Tubing Nitric or citric acid treatment removing free iron and strengthening the chromium oxide film — no dimensional change, stable passive layer. ### Ten sectors, ten different reasons the tube must not fail #### Oil & Gas and Petrochemical Process piping, offshore lines and refinery exchanger bundles working under high pressure, high temperature and chloride attack, where a weld-zone failure takes a whole unit offline. ### Certified, traceable, documented Our management systems are independently assessed and compliant with ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 for the manufacture and supply of stainless steel, alloy steel and carbon steel cold finish seamless tubes and pipes — straight, corrugated, U tubes and coil form. Every consignment ships with mill test certificates to EN 10204 3.1 / 3.2, heat-code marking, hydrostatic or pneumatic pressure testing and eddy-current or ultrasonic inspection. #### Quality Management System ISO 9001:2015 — certificate no. 2026040218 CERTIFIED 2 APRIL 2026 · VALID TO 1 APRIL 2029 #### Environmental Management System ISO 14001:2015 — certificate no. 2026040220 CERTIFIED 2 APRIL 2026 · VALID TO 1 APRIL 2029 #### Occupational Health & Safety ISO 45001:2018 — certificate no. 2026040219 CERTIFIED 2 APRIL 2026 · VALID TO 1 APRIL 2029 ### A techno-commercial *advantage* With 29 years of dedicated experience in the stainless steel tube industry, Mr. Minesh Vyas brings a rare blend of technical mastery and commercial acumen to AV Tech Tube Industry — a career built on bridging the gap between the factory floor and the boardroom. He has overseen the end-to-end lifecycle of stainless steel tube production, from raw material procurement and machine optimization to scaling commercial operations and expanding market reach. “We aren't just supplying stainless steel tubes; we are engineering long-term reliability for our partners.” ### Four reasons buyers stay #### Technical Authority Deep engineering expertise in tube design, advanced manufacturing and application-specific performance. #### Client-Centric Solutions We understand your precise operational needs to deliver engineered solutions rather than generic products. #### Operational Excellence Strict process discipline, safety and efficiency guarantee predictable, on-time outcomes. #### Global Readiness Operations, documentation workflows and communication streams structured for international business. ### Send us your specification Share grade, OD, wall thickness, length, standard and finish — our team will revert with feasibility, lead time and documentation scope. #### Request a quotation