Inspectioneering Journal

Inspection, Maintenance and Engineering Professionals, How Much Do You Know About Equipment in Hydrofluoric (HF) Acid Service?

This article appears in the January/February 1997 issue of Inspectioneering Journal

If you perform any type of inspection, plan or prioritize inspection, replacement or design of equipment in HF service you may be interested in the following NACE International resource, NACE Technical Committee report 5A171, "Materials for Receiving, Handling, and Storing Hydrofluoric Acid".

This helpful document covers items such as safety considerations, materials commonly used for shipment, aluminum (and Al alloys), carbon (and low alloy) steels, other metals and non-metallics, including bolting materials, the types of corrosion and cracking to expect, the importance of heat treatment, and some inspection references.

With carbon steels cracking and blistering can be a real concern. Don't forget, whenever inquiring about any technical publication, ask when the latest revision was made and if there are any in the process. See if drafts of in-process revisions might be available.

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