A second problem which sour service can cause in rolled steels, namely hydrogen pressure induced cracking (otherwise variously known as hydrogen-induced cracking (HIC), stepwise cracking (SWC), blister cracking, and by other terms)(HPIC), has also been shown to be dependent on hydrogen concentration within the steel , with different steels having different threshold hydrogen concentrations API pipes & tubes:Line Pipe for Sour ServiceLine pipe steels used in sour service are prone to hydrogen-induced cracking (HIC) depending on metallurgical and environmental factors. The metallurgical factors consist of alloying elements, microstructure, strength, segregation, and shape of non-metallic inclusions.
Aug 17, 2017 · All applications are reviewed by CORE Linepipe engineering department for suitability, Base line pipe must be manufactured in compliance with the sour service material requirements of CSA Z245.1, All underground metallic components shall be protected from corrosion in accordance with Clause 9 of CSA Z662, Corrosion monitoring in wet sour gas by use of hydrogen The pipeline steels operating in sour environments with presence in many cases of water and other corrosive agents, are subject to three specific corrosion mechanisms typically caused by wet hydrogen sulfide:HIC (Hydrogen Induced Cracking); SSCC (Sulfide Stress Corrosion Cracking); SOHIC (Stress Oriented Hydrogen Induced Cracking). Demands for sour service requirements for pressure Basic requirements for hydrogen corrosion in wet sour service Before hydrogen induced corrosion damages appear, the hydrogen must be absorbed by the steel. Basic requirement therefor is a corrosion reaction in a wet and sour environment. Furthermore the presence of H2S as promoter is necessary. The result of the corrosion reaction
Spiral weld pipe shall not be used in sour gas service, either for ASME B31.3 in-plant piping or for pipelines, unless it is heat treated in a furnace to relief residual stress. Spiral weld pipe that is not heat treated may be used for sour crude lines if approved by the Chairman of the Materials and Corrosion Control Standards Committee. John Boran, Dr - Materials, Corrosion and Welding Experienced, over 40 years, as an oil and gas industry and civil engineering consultant metallurgist. Specialising in materials selection, welding engineering, corrosion protection and control, coatings, insulation and non-destructive testing. Acted as a project technical authority in materials engineering. LINE & PROCESS PIPES - EEW GroupSteel (& LTCS) acc. to API, ASTM, ISO, DNV etc. High Strength Steel up to API 5L Grade X120 In the past, when predominantly sweet oil and gas reserves were tapped, standard carbon steel pipes were the preferred choice. With growing energy demands, sour reserves, especially natural gas wells, are developed more and more. For these severe conditions,
It minimizes the susceptibility of HSLA linepipe steels to HIC in sour gas or sour oil environments. It increases both tensile ductility and impact energy in the transverse and through-thickness directions in steels with tensile strengths below 1400 MPa. OCTG - Corrosion Resistance Alloy Pipes for Sour Gas May 03, 2018 · This index is requird not only for well corrosion aspects but also to combat strong atmospheric corrosion during storage in the Persian Gulf Area. Please, would it be possible to have an quote/ogffer for OCTG Corrosion Resistance Alloy Tubings for Sour Gas Drilling Services ( see details- ATTACHMENT ) in two different Sizes; Requirements for steel plates in sour serviceApr 30, 2016 · The oldest reports about sour service steel damage more than 60 years old Many organisations (like NACE or EFC), oil- and gas companies, engineering companies are still improving regulations The importance of hydrogen damage due to sour service is more and more recognised. The exploitation of sour gases and out of sour oil sources is rising.
The first ever reported TLC case was actually from a sour gas field in France . A serious corrosion issue (Figure 1) was discovered on the top part of a horizontal, buried 6 pipeline transporting a mixture of light hydrocarbons and inhibited water under stratified flow. The gas composition was 9% CO 2 and 15% H2S and the fluid temperature was between 35ºC and 50ºC.