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ISBN-10: 1902653548

ISBN-13: 9781902653549

It is a revised and up to date model of an EFC file at the attainable forms of H2S cracking which can ensue in an oilfield. It covers all goods of kit used, from the good to the export pipelines and likewise recommends try out equipment for comparing fabrics functionality. A key reference rfile for fabrics engineers and product providers operating in the oil and fuel undefined.

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1 i 1 i lO i lOO BAI~ i i i pCO 2 + pH2S Fig. 4 The pH limestone saturated or supersaturated formation waters under CO 2 and H2S pressure at 60°C. 100 9 • %. %. HCO 3 6ooo <-%,. 1 i i 1 i 10 i N 100 BAI i i pCO 2 + pH2S Fig. 5 The pH limestone saturated or supersaturated formation waters under CO 2 and H2S pressure at 100°C. 1. 1 of this document which stipulates hardness limits for carbon and low alloy steels operating in sour service. It gives guidance on test techniques and protocols, which will ensure that the true hardness is assessed as accurately as possible Although it is recognised that cracking can also occur in soft microstructure, particularly, for example, in regions weld heat affected zones (HAZs), assessment of such regions is not covered by this document.

NACE, Houston, Tx, USA. J-L. Crolet and M. R. Bonis, pH measurements under high pressures of CO 2 and H2S, Mat. , 1984, 23, 3542. J-L. Crolet and M. R. Bonis, An optimized procedure for corrosion testing under CO 2 and H2S gas pressure, Corrosion, 1990, 46, 81-86. M. Bonis and J-L. Crolet, Practical Aspects of the Influence of in situ pH on H2S Induced Cracking Corros. , 1987, 27, 1059-70. NACE standard MR0175, Sulphide Stress Cracking Resistant Metallic Materials for Oilfield Equipment. M. Watkins and R.

01 %oo B~ . pCO 2 + pH2S Fig. 2 The pH of limestone unsaturated formation waters under CO 2 and H2S pressure. • [ ,~10 ,~30 Ptal meqL ~)',~ "%, [7 100 '~, ~ ' , , --HCO 3 , / lOO~. -%. 01 ~ %1 1 10 ~ 100 BAI~ pCO z + pHRS Fig. 3 The pH limestone saturated or supersaturated formation waters under CO 2 and H2S pressure at 20°C. Guidelines on Materials Requirementsfor Carbon & Low Alloy Steels in H2S-Containing Environments T ~ ,10 PHI meqL -,,• t7 30~,. 100 10~•,,• / 10% ~HCO- ~, •%. 47 3 "x••x•,x " ~ , /lOOO'~ ", -~.

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B0766 Guidelines on materials requirements for carbon and low alloy steels for H2S-containing environments in oil and gas production (EFC 16) (matsci)


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