Weld Seam Removal Machines

A weld crown looks finished and is not. ASME and API surface-finish specs for pressure vessels and tanks require the reinforcement milled flush within a tight height tolerance before inspection, coating or lining.

A HDL-5D weld seam planer runs a self-feeding carbide tool along the seam, holding ± 0.1 mm height across multi-metre runs — well inside what a grinder can achieve. For the planer-vs-grinder selection logic see the best weld seam removal tools.

Longitudinal seams on pressure vessels and reactors are typically 6 to 18 metres long, with reinforcement of 3 to 8 mm to remove. Hand grinding this length is 90+ minutes per metre by a competent operator, with rework probability of 15 to 30%.

A walking planer covers the same metre in 2 to 3 minutes, with rework probability below 2%. On a typical vessel shop running ten such seams per day, the machine pays back inside a quarter on welder time alone, before counting rework cost.

Storage tanks, water vessels and chemical tanks need the inside seam flush before lining is applied. A grinder leaves swirl marks that adhesion testing picks up later as coating failures; a planed seam leaves a controlled finish the coating can bond to.

Same machine, same workflow as longitudinal seam finishing — see the HDL-5D planer spec for the access geometry. For pre-weld grinding cleanup see pneumatic industrial tools.

Grinding stainless adds heat tint and chromium-depleted layers that fail PMI and pickle-passivate later. A cold planer holds the parent metallurgy — no thermal damage, no oxide, no rework.

Use dedicated tooling on stainless work — same colour-coding logic as stainless beveling. Bring the alloy grade, seam dimensions and surface-finish requirement to the quote form and we will match the planer and tooling pack.