Hot Spot ISO 17292

Published: 13th May 2014 | Issue 29 Share article:

A revision to ISO 17292 – “Metal ball valves for petroleum, petrochemical and allied industries” is being submitted for DIS enquiry. The enquiry opens on 8 May 2014, and closes on 8 October 2014.

A copy of the standard showing the proposed revisions is issued for comment.

Summary of proposed changes include:

• Scope increased to include DN 600, NPS 24

• Class 800 no longer restricted to reduce bore only,

• Seat materials to include modified PTFE and reinforced modified PTFE

• Table 1 - Minimum seat pressure/temperature rating contains significant changes to the previous edition.

• Revised selected bore diameters in Table 2.

• Clarification that the strength of the stem above the packing shall be stronger than the internal portion at the maximum rated temperature;

• Added provision for purchaser to request manufacturer to provide method for preventing excessive pressure when fluid is trapped in centre cavity between seats;

• Expanded required information on identification tag to include separate trim and seat/seal materials. In addition, material for identification plate limited to stainless steel or nickel alloys

• Added requirement that thread sealant used on plugs for tapped auxiliary connections be capable of the fully pressure‐temperature rating of the valve;

Any comments should be directed to BVAA for onward submission to ISO by end of August 2014.

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