Stainless Steel Tubes – Types, Applications and Selection Criteria

Stainless Steel Tubes – Types, Applications and Selection Criteria

Stainless steel tubes are used in construction, industry, architecture, food processing, water systems and decorative applications. The correct tube depends on material grade, manufacturing method, surface finish, dimensions and the required standard.

Material grades

AISI 304 is the most common stainless steel grade and suits most indoor and standard outdoor uses. AISI 316 offers better corrosion resistance in coastal, marine, chemical and chloride-rich environments. The grade should always be selected according to the exposure conditions.

Welded and seamless tubes

Welded tubes are made from formed strip and are cost-effective, widely available and suitable for most structures, handrails and low-to-medium pressure systems. Seamless tubes are made without a longitudinal weld and are preferred for high pressure, hydraulic, chemical and critical industrial applications.

Shapes and dimensions

Round tubes are common in handrails, piping and sanitary systems. Square and rectangular tubes are common in frames, supports and architectural structures. Oval and special profiles are used where appearance or ergonomics matters.

Surface finishes

Stainless tubes can be supplied with a mill finish, brushed finish, polished finish or special surface treatment. Visible architectural applications usually require a more controlled surface finish, while industrial uses may prioritise function and certificate documentation.

Selection criteria

Before ordering, define the outside dimensions, wall thickness, grade, length, quantity, finish, standard and certificate requirement. Also consider whether the tube will be welded, bent, exposed outdoors or used in contact with chemicals.

Standards and certificates

Common standards include EN 10217-7, EN 10216-5, EN 10296-2 and EN 10297-2. EN 10204 3.1 certificates provide traceability and confirm chemical and mechanical properties. Kominox supplies stainless steel tubes for standard and project-specific needs.