Stainless steel round pipe 21.3x3 mm AISI 304 (600 GRIT) — a high-quality round structural metal product of precise gauge, made of premium food-grade austenitic steel. The main structural feature of the product is its extreme wall thickness: with a fixed outer diameter of 21.3 mm, the pipe has a maximum wall thickness of 3.0 mm (the inner through-diameter is 15.3 mm). This unique configuration provides the highest indicators of mechanical rigidity, colossal resistance to bending, fracture, and stability under significant loads. The products are manufactured by welding using advanced TIG (Tungsten Inert Gas) technology with complete technical cleaning and multi-stage mirror polishing of the outer weld and the outer surface to the highest roughness class of 600 GRIT (chrome, mirror, gloss). Finishing makes the weld visually and tactually imperceptible from the outside, and also reduces the number of micro-roughnesses where dirt could accumulate. The pipe is supplied in bars 6 meters long.
Material of Manufacture and Standards
This profile is made of high-reliability stainless steel grade AISI 304, which contains approximately 18% chromium and 8–10% nickel, acting as a premium analogue of the domestic alloy 08X18H10 and the European standard EN 1.4301. Due to the high nickel content, this metal has flawless corrosion resistance, excellent weldability, and increased durability. The AISI 304 modification is completely eco-friendly and safe, which is why it is widely used in the food and medical industries. Production is strictly regulated by leading international engineering institutes and fully complies with ASTM A-554 (USA) standards for structural pipes and EN 10296-2 (Europe). This guarantees perfect roundness, accuracy of geometric parameters, and maximum reliability of the welded joint along the entire length. Country of origin — Vietnam.
Scope of Application and Purpose
The combination of a flawless mirror gloss (600 GRIT), high hygiene, and extreme load-bearing capacity due to the thick 3.0 mm wall makes the 21.3 mm diameter pipe a versatile material for design, construction, architecture, and engineering. Due to the solid wall thickness, this model is a perfect blank for cutting deep internal or external threads, manufacturing strong barrel nipples, short threads, threaded pipe nipples, and reliable threaded connections. It is successfully used for manufacturing elements of heat exchange, medical, and commercial equipment, protective guards, as well as in high humidity conditions (bathrooms, restrooms, swimming pools, saunas, and coastal areas) where oxidation resistance is critically important.
Recommended environment: facilities with high humidity (swimming pools, saunas, coastal marine areas, bathrooms), food blocks, medical institutions, industrial enterprises, exhibition halls, as well as complex engineering solutions in technology and machine building.
Technical and Operational Limitations:
• Structural purpose: the product belongs to the category of structural metal roll and is not designed for internal hydraulic pressure; therefore, it is categorically prohibited to use it in pressurized main pipelines and high-pressure hydraulic systems.
• Chemical regime: despite the outstanding corrosion resistance of AISI 304 steel grade, it is not recommended for operation in highly aggressive chemical environments (concentrated acidic or alkaline solutions).
• Temperature regime: the maximum continuous operating temperature is +600°C, the maximum short-term temperature is up to +850°C, and the minimum operating temperature is -196°C. Resistance to sudden temperature changes is high.
Technical Recommendations for Mirror Surface Care
Recommended Cleaning Methods:
To preserve the original chrome brilliance of the 600 GRIT surface for a long time, mild soap solutions or specialized chlorine-free disinfectants should be used. Cleaning is carried out exclusively with a soft cloth (microfiber) or a soft foam sponge, which easily removes dust and contaminants from the smooth surface.
Prohibited Care Products and Methods:
It is categorically prohibited to use products containing chlorine, active acids, as well as stiff metal brushes and any abrasive powders. Failure to comply with these rules leads to damage to the protective oxide layer, the appearance of micro-scratches, and irreversible tarnishing of the mirror gloss.
The products are delivered in proper commercial condition (new) and are protected by a special polymer film, which completely minimizes the risk of accidental damage, scratches, and the formation of scuffs during logistical operations, storage in the warehouse, or installation.
Only at "Ukirs" company can you purchase direct supplies of stainless steel roll and buy a round stainless steel pipe ∅ 21.3x3 mm grade AISI 304 (600 GRIT) TIG ASTM A-554 at the most favorable market cost! Sales are released with a minimum order multiple of 3 meters. We guarantee high quality of products, competitive prices, and fast delivery by verified transport services throughout Ukraine.