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API Specification 6A Furnace Calibration Requirements

Tim Haeberle30 June 2011

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The Problem

Current Wording:

•API Spec 6A 20th Edition, Annex M, “Qualification of heat-treating equipment”, Section M.3.3, “Temperature survey method for calibration of batch-type furnaces”, states the following in the last sentence:

“When a furnace is repaired or rebuilt, a new temperature survey shall be carried out before the furnace is used for heat treatment.”

The Problem:• This implies a time-consuming and costly full survey is

required, even for minor repairs to a furnace that will in no way affect the calibration or temperature uniformity in the furnace.

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Proposal:

• Revise the API Spec 6A 20th Edition, Annex M, Section M.3.3 to add the following statement after the last sentence:

“Repairs that return the furnace to the condition it was in at the time of the last furnace survey and calibration or repairs that do not affect the temperature tolerance of the furnace shall not require a new temperature survey and calibration.”

The Solution

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Justification:

• There is no need to perform a costly and time consuming new temperature survey and calibration after repairs that do not affect the temperature tolerance of the furnace.

• Other recognized industry standards for furnace calibration permit such repairs without re-calibration. These include:

SAE AMS 2750D

The Solution

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AMS 2750D

Reprinted with permission from SAE AMS2750D © 2005 SAE International

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AMS 2750D

Reprinted with permission from SAE AMS2750D © 2005 SAE International

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API CSOEM SR3 Form

• Form ready for submittal

• No money requested

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API Ballot

• Form ready for submittal

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End Of Presentation