FREQUENTLY ASKED QUESTIONS

Light surface rust does occur with time, this is perfectly normal but won’t affect the quality of the tube itself. The rust can be easily removed by using a scouring pad and applying a light oil coating afterwards.

Standard carbon tube is made from G250 coil material. For automobile roll cages, a specialist grade of steel is used and manufactured to a unique standard. Ask for MSNZ compliance Rollcage Tube if this is what you are sourcing carbon tube for.

Standard galvanised tube is manufactured with Z275 coil, which has a minimum of 275gm2 of zinc. Heavier galvanised coated tube can be manufactured ex mill rolling. Please contact our sales team for more information on order quantity and lead time. They’re always happy to help.

In damp or moist conditions, a white powder can form on a galvanised surface. This must be cleaned down prior to painting or powdercoating. To help prevent the white powder from appearing, galvanised tube should be stored with spacer between steel surfaces.

Industrial Tube's standard tube length is invoiced at 5.5 metre lengths but, each tube is approximately 50mm longer so customers can trim the cropped ends if required. Special lengths are available ex-rolling. Non-standard cut to length tube is also available with our value-added precision cutting service. Our team can provide this service for you should you require.

Industrial Tube's stainless tube comes in 6 metre lengths. Special lengths are available ex-rolling or within shorter time frames. Our team can also cut-to-length with our value-added precision cutting service. Just let them know if that is what you need.

Industrial Tube's standard products are rolled every four to eight weeks. Where possible, we will add specialist lengths to these rolling cycles. If you require a particular length produced, please contact our sales and production team for more information.

The shortest length is 4 metres for carbon and stainless. The longest length for carbon is 12 metres, whereas the longest length for stainless is between 8-12 metres, dependent on the diameter. Contact our sales and production team for more information.

The AS 1528.1 standard allows for as-produced or buff polished external finishes as specified by the customer. Our standard external finish is buff polished to a minimum 320G finish. The internal finish of our tube (excluding the weld zone) is typically 0.2-0.6μm Ra. The internal weld zone roughness allows for a maximum Rt value of 14.0µm as per the standard. Our results typically range from 2.0 – 6.5Rt.

All tube sold by Industrial Tube is manufactured in New Zealand in our Hamilton factory. This has been the case since we began and contributes to the 35 year history we are extremely proud of.

ERW Tube is a reference to Electric Resistance Welded tube. ERW steel tube is available in various shapes; square, rectangular, round and oval and various finishes, wall thicknesses and diameters and has a visible seam along the longitudinal welded edge.

For automobile roll cages, a specialist grade of steel is used and manufactured to a unique standard. Industrial Tube’s carbon tube for Roll Cages is manufactured in compliance with the Motorsport MSNZ- Q29. 38.1mm available in 5.5m lengths. 44.5mm available in 4m lengths.

CRA mild steel is typically used for applications that require a higher-grade surface finish for improved application of coatings, tight dimensional OD and ID tolerances (telescoping) and superior formability and ductility.

Aluminised steel is used extensively in automotive exhaust systems due to its heat resistance and corrosion protection.

Pre-Galvanised steel is used in many applications where corrosion resistance, tight dimensional tolerances and/or formability are important.

HRP mild steel is used for applications that include outdoor structures, automotive roll cages, hardware, cargo barriers and racking systems.