Manufacturer of cold-applied corrosion protection systems · Nanjing, China · since 2017[email protected]WhatsApp +86 183 5198 9892

Above-Ground Pipework and Structural Steel Maintenance

Pipe racks, utility lines and structural steel in an operating plant corrode locally, not uniformly: at supports, at fittings, under insulation terminations and at bolted connections. Recoating those details properly means scaffolding, containment, blasting and a shutdown — which is why they are usually patched, and why the patches fail again.

Utility lines in a plant pipe rack
Solution 05

Above-Ground Pipework and Structural Steel

Pipe racks, utility lines and structural steel in an operating plant corrode locally, not uniformly: at supports, at fittings, under insulation terminations and at bolted connections. Recoating those details properly means scaffolding, containment, blasting and a shutdown — which is why they are usually patched, and why the patches fail again.

Corrosion risk

  • Corrosion under and around pipe supports where water is trapped.
  • Local paint breakdown at fittings, welds and edges in humid industrial atmospheres.
  • Ultraviolet degradation and thermal ageing of exposed protective layers.
  • Restricted access and permit constraints that rule out blasting and hot work.

Recommended configuration

Local preparation to St2 → primer → paste at the crevices → petrolatum or wax tape over the detail → aluminium foil outer wrap. Done in one visit, on a live line, without a hot-work permit. The foil outer wrap carries the ultraviolet and weather load, so the primary layer beneath it is not thermally aged.

Five-stage cross-section through pipework at a rack support: locally prepared steel, tape primer, sealing mastic pressed into the support contact crevice, petrolatum or wax tape, and a reflective aluminium foil outer wrap against ultraviolet.
Application sequence, shown in section Stages, products and figures as stated in ZH-SOL-05.

Send us the asset, we will propose the system

Asset type, dimensions, operating temperature, exposure and estimated quantity are enough for us to return a system configuration, a material estimate and the supporting documents.