1 API SC6 Winter Meeting Other Materials Issues Tim Haeberle Chief Consulting Engineer – Materials and Processes GE Oil & Gas 4 February 2015

API Bolting Specification Requirements In response to BSEE requests, API is implementing new bolting spec requirements to prevent H-embrittlement failures in marine environments (subsea and surface) The issue is being addressed somewhat independently in each of the API SC’s This is leading to similar, but different requirements For example, low alloy steel bolting max hardness API 6A – Only for NACE sour service and the limits in the ASTM specs API 16A – 4 th Ed being drafted will spec 34HRC max and API 20E & API 20F (includes references back to API 6A) API 17D – 35 HRC max (includes references back to ISO / 6A) API 20E – 34 HRC max (but no explanation why it is there) 2

What can API SC6 do to support the BSEE requests? API 6A 21 st Edition can include a reference to API 20E API 6A 21 st Edition can include a reference to API 20F In the future, a full stand-alone API bolting document could be developed to be referenced by all SCs Would avoid references to API 6A Could cover design, materials, and quality 3