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On November 19, 2018, our company received the designated third party inspection. The detection unit is BV. The inspection is mainly for the flange that meets our NACE standard for our customers. Hydrogen sulfide stress corrosion cracking test SSC and anti hydrogen brittle HIC for NACE flange were mainly carried out.
nace flange
According to the international standards of NACE TM0177 (Laboratory Test for Resistance to Sulfide Stress Cracking and Stress Corrosion Cracking of Metals in Hydrogen Sulfide Environment) and NACE MR0175 (Metal Material for Resistance to Sulfide Stress Corrosion Cracking and Stress Corrosion Cracking of Oilfield Equipment), HIC/SWC (Stepped Cracking) and SSC (Sulfide Stress Cracking) tests were carried out. The results showed that the sulfur and hydrogen resistant results were qualified. It has been verified in international projects with high sulphur and chloride ions that the high sulphur-resistant and hydrogen-resistant pipe fittings produced by our company are suitable for acid wet natural gas and crude oil medium environment (hydrogen sulphide content (> 300 g/m3), chloride ion content (> 260 g/mL) and carbon dioxide content (> 300 g/m3), and in this environment. It has been running safely for more than 15 years.

Hydrogen sulfide stress corrosion cracking test SSC refers to the brittle cracking of metal materials or structures under the combined action of static tensile stress and specific corrosion environment.
Anti hydrogen embrittlement HIC means that hydrogen in steel will embrittate the mechanical properties of materials, which is called hydrogen embrittlement. It occurs mainly in carbon steel and low alloy steel. It includes hydrogen embrittlement HIC, crack sensitivity ratio CSR, crack length ratio CLR and crack thickness ratio CTR.
NACE flange 
The test was very successful. The NACE flanges we provide to customers are in line with the testing standards and will be shipped to the port next Tuesday. If you also have relevant NACE product requirements, you can contact us at any time, and we will provide you with the best price on the premise of ensuring the quality of materials.

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