Stainless Steel Fabrication

Food-grade hygienic stainless for dairy, food & beverage, water and wastewater infrastructure and more.

Stainless has been at the core of our work for over 30 years.

Longveld started out installing stainless steel in New Zealand dairy plants, and stainless is still the core of what we do — tanks and silos, vessels, hoppers, cyclones, process equipment, tanker barrels and the platforms that carry them.

We design, fabricate and install under one roof. One team carries one set of drawings from first sketch through to site, so there are fewer handovers, fewer surprises and a build that matches what was specified.

Welding quality is managed to AS/NZS ISO 3834-2, with qualified welding coordination, documented procedures and material traceability on every job. We work with engineering consultants, capital projects teams, procurement managers and asset owners in regulated environments.

What we build

Tanks and Silos

1M³ – 100M³

Storage and balance tanks, processing and mixing tanks, CIP and chemical handling, chilled water and product silos.

Process vessels and reactors

ACROSS ALL SECTORS

Filter vessels, MBBR reactors, lamella clarifiers and the internals that make them work.

Powder handling and hoppers

UP TO 100M² UNITS

Bulk powder hoppers, cyclones and separators for dryer plant.

Bespoke process equipment

DESIGNED FROM YOUR BRIEF

Purpose-built plant that isn’t on anyone’s catalogue — dryer and evaporator components, handling equipment, guarding and one-off machinery.

Built from a process brief, not a drawing set — mechanical design, engineering calculations and FEA in-house
Prototyping and validation before committing to a production run
Modular construction where the build has to land inside a working plant
Integrates with CIP, pneumatic transfer, heating and cooling, and automated lines
Your intellectual property stays with you, under confidentiality as standard

Access platforms and walkways

AS 1657

Catwalks, mezzanines, platforms, stairs and handrails — including retrofits into plants that can’t come offline.

304 stainless in closed sections — SHS, RHS and CHS with radiused profiles that shed water and product
Designed to AS 1657:2018
Chequer plate decking sloped to point drains, scheduled polishing before inspection
Laid out from 3D scans of the existing room — as-built, not as-drawn
Carbon steel hot dip galvanised to AS/NZS 4680 where hygiene doesn't demand stainless

Tanker barrels and transport

26+ YEARS | FLEET SCALE

Milk tanker barrels, trailer components and vehicle fitouts, built and retrofitted at fleet scale.

Traceability & Quality Assurance

On food and water work, the weld you can’t see is the one that matters — and so is the steel underneath it. Material is traced from the mill certificate to the finished item, and every weld is tied to a qualified procedure and the welder who ran it.