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Sulfide stress cracking

The susceptibility of carbon steels to SSC is directly related to their strength or hardness levels. As carbon of low-alloy carbon steel is heat-treated to progressively higher levels of hardness, the time to failure decreases rapidly for a given stress level. [Pg.79]

Temperature is also a factor. The most severe SSC takes place in the temperature range of 20-120°F (— 7 to 49°C). Above 120°F (49°C), the diffusion rate of hydrogen is so fast that the hydrogen passes through the material so quickly that the critical concentration is not reached. Below 20°F (— 7°C), the diffusion rate is so slow that the critical concentration is never reached. [Pg.79]

By carefully monitoring the processing of carbon and low-alloy carbon steels, and keeping the hardness level below 22 HRC, these steels will have acceptable resistance to SCC. [Pg.79]


Sulfide Stress Cracking Resistant Metallic Materialfor OilField Equipment, NACE Standard MR-01-75, 1980 rev.. Technical Practices Committee, National Association of Corrosion Engineers, Houston, Tex., 1980. [Pg.156]

Sulfide Stress Cracking) on steels over Rockwell C 22. (4) static stresses. other equipment handling sour gas, oil and/or water wherein H2S and H2O (liquid phase) are present up to about 150 F, where sulfide stress cracking slows down perceptibly. stainless steels with Rockwell hardness over C 22. (4) into crystal structure, exact mechanism uncertain. Sulfur expedites absorption of atomic H into grain structure. (4) if feasible use inhibitors and/or resistant coatings where feasible time or heating up will permit H to diffuse out but will not relieve any areas when H2 has concentrated. [Pg.255]

Rockwell C 22 is the commonly selected limit above which sulfide embrittlement and resultant sulfide stress cracking become problems. The change, however, is not that abrupt but the critical "gray band" is about C 20 to 25, with the point of change affected by mechanical, physical and chemical environmental factors. [Pg.255]

In the sulfide stress cracking region, appropriate metallurgy is required in line piping, pressure vessels, etc. There is a listing of acceptable steels in the NACE standard. Steels with a hardness of less than 22 Rockwell C hardness should be used in areas where sulfide-stress cracking is a problem. [Pg.153]

The concentration of H2S required for sulfide-stress cracking in a multiphase gas/liquid system (Figure 7-2) is somewhat higher than in pure gas streams (Figure 7-1 ). The liquid acts as an inhibitor. [Pg.153]

The vessel is generally constructed of carbon steel that has been heat treated. Control of metal hardness is required because of the potential of sulfide-stress cracking. The iron-sponge vessel is either internally coated or clad with stainless steel. [Pg.181]

For sour service, National Association of Corrosion Engineers (NACE) MR-01-75 requires that steel material have a Rockwell C hardness of less than 22 and contain less than 1% nickel to prevent sulfide stress cracking. [Pg.448]

NACE MR 0175, Sulfide Stress-Cracking Resistant Metallic Materials for Oil Field Equipment... [Pg.38]

N ACE MR0175, Sulfide stress cracking resistant metallic materials for oilfield equipment. 11)... [Pg.14]

Ohki, T, Tanimura, M. Kinoshita, K. Teniryo, G. "Effect of Inclusions on Sulfide Stress Cracking", 1/1977, Private Publ. by Nippon Kokan Kabushiki Kaisha Technical Research Center, Japan. [Pg.77]

Corrosion, stress, temperature Sulfide stress cracking... [Pg.151]

Sulfide stress cracking (SSC) cracking in steels of high strength or high hardness.135... [Pg.438]

Elboujdaini, M., Hydrogen Induced Cracking and Sulfide Stress Cracking, CANMET Materials Technology Laboratory, Ottawa, Canada, pp. 1-13, 2005. [Pg.457]

NACE Standard TM0177, "Testing of Metals for Resistance to Sulfide Stress Cracking at Ambient Temperatures," NACE, Houston, TX, latest revision. [Pg.104]


See other pages where Sulfide stress cracking is mentioned: [Pg.467]    [Pg.136]    [Pg.448]    [Pg.1251]    [Pg.1281]    [Pg.1282]    [Pg.1306]    [Pg.1325]    [Pg.30]    [Pg.348]    [Pg.900]    [Pg.232]    [Pg.136]    [Pg.41]    [Pg.42]    [Pg.72]    [Pg.379]    [Pg.435]    [Pg.435]    [Pg.518]    [Pg.551]    [Pg.250]    [Pg.37]    [Pg.104]    [Pg.107]   
See also in sourсe #XX -- [ Pg.181 , Pg.448 ]




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