Nace mr0175 and mr0103 standards metals for sulfide stress. Effect of coldwork on sulphide stress cracking resistance twi. Sulfide stress cracking resistant drill pipe addresses h2s challenges. The sulfide stress cracking ssc resistance of nicontaining lowalloy steels was studied using laboratory and commercial heats over the range of 600 to. Effects of applied stress and microstructure on sulfide stress cracking resistance of pipeline steels subject to hydrogen sulfide were investigated by the singleedge notched tensile method using a microalloyed steel and a nonmicroalloyed steel. Data presented show that the proposed test is highly sensitive to a steels sulfide cracking resistance. A type of spontaneous brittle failure in steels and other highstrength alloys when they are in contact with moist hydrogen sulfide and other sulfidic environments. The experimental design considers the molar content of h 2 s in the associated gas and the nacl concentration in the test brine as. Connolly and masakatsu ueda and hisashi amaya and hideki takabe, year20.
Nace, 2003, december also international standards organization iso 15156, petroleum and natural gas industriesmaterials for use in h. It is a progressive type of failure that produces cracking at stress levels that are well below the materials tensile strength. Hot sulfide containing caustic solutions are of interest to various industrial chemical processes, including pulp and paper as well as nuclear industry. The polythionic acid sulfurous acid and hydrogen sulfide environment provides a way of evaluating the resistance of stainless steels and related alloys to intergranular stress corrosion cracking. Susceptible alloys, especially steels, react with hydrogen sulfide, forming metal sulfides and atomic hydrogen as corrosion byproducts. Table 1 summary of samples extracted from the pipe girth weld and activities. Four point bend sulfide stress corrosion cracking tests of 30 days duration were.
Corrosion resistance stress corrosion cracking 2205 is a cost effective solution for many applications where 300 series stainless steels are susceptible to chloride stress corrosion cracking scc. This standard addresses the testing of metals for resistance to cracking failure under the combined action of tensile stress and corrosion in aqueous environments containing hydrogen sulfide h2s. Ansinace mr0175 sulfide stress cracking resistant metallic materials for oilfield equipment sorry this product is no longer available metallic material requirements for resistance to sulfide stress cracking ssc for petroleum production, drilling, gathering and flowline equipment in hydrogen sulfide h2sbearing hydrocarbon service. Sulfide stress cracking ssc is a form of hydrogen embrittlement which is a cathodic cracking mechanism. To check its resistance to scc and ssc, several tests were performed. Hydrogen stress cracking is a form of embrittlement occurring when corrosion from certain acids causes atomic hydrogen to penetrate higher strength steels. It is a form of hydrogenrelated cracking and can have two distinct morphologies.
Gangloff auqust, 2003 page 6 of 194 ti and zr alloys is discussed elsewhere in volume 6. Resistance to sulfide stress cracking is achieved by precise controls of chemical composition, heat treatment, and hardness levels. Wet h 2 s cracking can occur in susceptible steels exposed to aqueous environments containing hydrogen sulfide. The national association of corrosion engineers nace test method tm0177 is widely used to qualify metals for resistance to sulfide stress cracking and stress. Sulfide stress cracking nace mr01752002, mr0175iso. The present study evaluates the effect of the brines ionic strength upon the sulfide stress cracking resistance. Effect of brine ionic strength on sulfide stress cracking. Corrosion in controlled low oxygen environments ppb level under deposit corrosion evaluation, including electrochemical capability. Hydrogen assisted cracking of high strength alloys richard.
Sulfide stress cracking is a form of hydrogen embrittlement that occurs in highstrength steels. Sulfide stress cracking of nickelcontaining lowalloy steels in. Wet hydrogen sulfide h2s cracking inspectioneering. Sulfide stress corrosion cracking resistance was evaluated as per nace tm017796 method a using cylindrical test piece and a load ring. It should not be confused with the term stress corrosion cracking which is an anodic cracking mechanism. Sulfide stress cracking is a form of hydrogen embrittlement that occurs in high strength steels and in localized hard zones in weldment of susceptible materials. Alloy 1515lc was extremely susceptible to stress corrosion cracking in chloride solutions both with and without h2s. Sulphide stress cracking ssc is the biggest concern 9. This phenomenon is generally termed sulfide stress cracking ssc 1 when. Nace, 2003, december also international standards organization iso 15156, petroleum and natural gas industriesmaterials for use in h 2 s containing environments in oil and gas production. The first type is commonly referred to as hydrogen induced cracking hic and can occur where little or no applied or residual tensile stress exists.
Ssc is a form of spontaneous brittle breakdown in occurring in highstrength alloys and steels when it comes in contact with humid hydrogen sulfide as well as sulfidic atmospheres. Sulfide stress corrosion cracking and hydrogen induced cracking of a216wcc wellhead flow control valve body. Sulfide stress cracking is a function of hydrogen sulfide concentration as low as ppm, hydrogen sulfide partial pressure, stresses, material yield strength, temperature and ph. Sour service limits of dualcertified 316316l steel twi. Technical report development for material and application. The choice of material for a particular set of well conditions is based on a number of selection criteria including. Hydrogen assisted cracking of high strength alloys richard p. The precipitationhardening stainless steel 174 ph is widely used for oilfield components tubing hangers and valve stems due to its favourable combination of high strength and corrosion resistance. Mechanical properties, general corrosion resistance, pitting and crevice corrosion resistance, chloride stress corrosion cracking resistance, sulfide stress corrosion cracking resistance. Basics of sulfide stress cracking ssc and stress corrosion cracking scc ssc and scc are cracking processes that develop in the presence of water, corrosion and surface tensile stress. Connections, sulfide stress cracking, and corrosion resistant material.
Sulfide stress crackingresistant drill pipe addresses h2s. Find upcoming conferences, training sessions, online events, and more. Effect of coldwork on sulphide stress cracking resistance. Nace tm01772016 laboratory testing of metals for resistance to sulfide stress cracking and stress corrosion cracking in h2s environments. Materials selection properties the levels of strength in agehardened materials becoming increasingly important, particularly for offshore applications that are exploiting highpressure deep well reserves, where weight considerations can affect the economic viability of a project. Standard test method laboratory testing of metals for. Corrosionpedia what is sulfide stress cracking ssc. Pdf sulfide stress corrosion cracking and hydrogen. This standard presents metallic material requirements to provide resistance to sulfide stress cracking ssc andor stress corrosion cracking scc for petroleum production, drilling, gathering and flow line equipment, and field processing facilities to be used in hydrogen sulfide.
When placed in proximity to tensile stresses, embrittlement and the beginnings of brittle fracture may occur. Sulfide stress cracking ssc testing hydrogen sulfide h 2 s is a naturally occurring gas that can be deadly to humans and corrosive to oil and gas equipment, especially in the presence of water. Pdf electrochemical and sulfide stress corrosion cracking. Sulfide cracking resistance is described in terms of the critical stress intensity for environmentally induced slow crack growth k lt. Sulphide stress cracking of 174 ph for applications in.
The environmental factors that increase the cracking susceptibility include higher temperatures, increased chloride content, lower ph, and higher levels of tensile stress. The national association of corrosion engineers nace test method tm0177 is widely used to qualify metals for resistance to sulfide stress cracking and stress corrosion cracking in h 2 s environments. Highperformance age hardenable nickel alloys solve. This practice can be applied to wrought products, castings, weld metal of stainless steel or other materials that are used in environments. Us9234254b2 highstrength seamless steel tube, having. The day will end with participants learning about tubular manufacturing and testing. Resistance to sulfide stress cracking natural gas and oil inherently contain a certain amount of hydrogen sulphide h 2 s.
Carbon and lowalloy steels are commonly tested for ec resistance at room temperature where ssc susceptibility is typically high. Effect of applied stress and microstructure on sulfide. Tcr arabia corrosion testing, nace, astm, laboratory. Sulfide stress cracking mostly occurs in very highly acidic environments.
In this environment, not only is hydrogen sulfide stress cracking a concern, but the presence of. Stress corrosion cracking by krittin rattakham duration. Nace ssc, method a, testing is specified at a threshold stress of 85% of specified minimum yield strength. Evaluation of sulfide corrosion cracking resistance in low. Sulfide stress cracking ssc testing southwest research. Sulfide stress corrosion cracking and hydrogen induced. The effects of coldwork and strain aging on the sulfide stress cracking resistance and mechanical properties of expanded tubular steels. Sulfide stress cracking an overview sciencedirect topics. Sulfide stress cracking nace mr01752002, mr0175iso 15156.
In the presence of oxygen aerobic, some bacteria may directly oxidize iron to iron oxides and hydroxides, other bacteria oxidize sulfur and produce sulfuric acid causing biogenic sulfide corrosion. Sulfide stress cracking ssc testing southwest research institute. Scc will occur when stainless steels are subjected to tensile stress, while in contact with solutions containing chlorides. Uss rys110 is a proprietary restricted yield strength u. Among the most prone to sulfide stress cracking include valve trim, blowout preventer hard parts and tool joints. It is therefore implied that plastic deformation under 5% strain should have no significant impact on the resistance to sulphide stress cracking of cmn steels. Evaluation of the seabed temperature corrosion and. Sulfide stress cracking resistance of lowalloy nickel. Sulfatereducing bacteria are active in the absence of oxygen anaerobic.
The resistance to chlorideinduced stress corrosion cracking of uns n08031 was tested on ubend specimens according to astm g 30 for a testing time of 2000 hours. Corrosion under insulation cui crevice corrosion and pitting. Sulfide stress cracking ssc also known as sour gas cracking sour gas. Mr 0175c, metals for sulfide stress cracking and stress corrosion cracking resistance in sour oilfield environments. The nace mr0175 standards metals for sulfide stress cracking and stress corrosion cracking resistance in sour oilfield environments. Oil and gas well drilling and servicing etool general. In combination with increased temperatures and pressure in environments containing chloride, sulfide stress cracking ssc can occur. It is also interesting to remark that nace standard mr 0103, materials resistant to sulfide stress cracking in corrosive petroleum refining. More recently, a number of studies have been concerned with the effect of cold expansion on the resistance to sulphide stress cracking of pipes. The wellhead flow control valve bodies which are the focal point of this failure case study were installed in some of the upstream facilities of khangirans sour gas wells. Strain and sulfide stress cracking in pipeline girth welds twi. Sulfide stress cracking ssc occurs at locations where atomic hydrogen is able to diffuse at sites of high internal stress, such as grain boundaries, inclusions and regions of triaxial stress at notches.
530 415 1241 805 259 1014 266 622 683 477 663 775 1071 859 900 644 1258 1110 960 17 1144 154 1100 1133 972 1396 139 1119 586 270 546 808 1165 111 309 1467 1229 643 343 972 1187