NACE Standard MR0175/ISO 15156-1: Petroleum and Natural Gas by NACE International

By NACE International

ISO (the overseas association for Standardization) is a world federation of nationwide criteria our bodies (ISO member bodies). The paintings of getting ready foreign criteria is in general performed via ISO technical committees. every one member physique attracted to a subject matter for which a technical committee has been demonstrated has the ideal to be represented on that committee. overseas agencies, governmental and non-governmental, in liaison with ISO, additionally participate in the paintings. ISO collaborates heavily with the overseas Electrotechnical fee (IEC) on all concerns of electrotechnical standardization.

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Extra info for NACE Standard MR0175/ISO 15156-1: Petroleum and Natural Gas Industries

Example text

The top line of survey should be positioned so that the heat-affected zone impressions coincide with the heat-affected zone of the final run or change in profile of the cap of fusion line associated with the final run. Figure 4 — Repair and partial penetration welds 14 © NACE/ANSI/ISO — All rights reserved NACE MR0175/ISO 15156-2:2003(E) Dimensions in millimetres Key A B C D weld weld heat-affected zone (visible after etching) parent metal lines of survey Hardness impressions in the weld heat-affected zone should be located within 2 mm of the fusion boundary.

SSC testing, as agreed with the equipment user, shall demonstrate that the performance of the alloy meets or exceeds that of field proven material. 3 Drilling, well construction and well-servicing equipment only exposed to drilling fluids of controlled composition Given the high strength often needed, drilling equipment might not comply with NACE MR0175/ISO 15156. In such cases the primary means for avoiding SSC is control of the drilling or well-servicing environment. As service stresses and material hardness increase, drilling fluid control becomes increasingly important.

1 — Sour gas systems: H2S partial pressure isobars © NACE/ANSI/ISO — All rights reserved 35 NACE MR0175/ISO 15156-2:2003(E) Annex D (informative) Recommendations for determining pH Use of Figure 1 requires the determination of in situ pH for the production conditions. 5 give a general guide to the determination of an approximate value of the pH of the water phase for various conditions. pH determined in this way may be used if no proven calculation or reliable in situ measuring techniques are available.

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