The dimensional standard of these flanges is ASME B16.5 standard.Blind flanges are produced in classes 150 to 1500, but according to the API standard, classes 2000, 3000, 5000, 10000 and 15000 can be made at the customer's request.According to ANSI B16 standard.34 They are divided into classes 150, 300, 600, 900, 1500 and 2500.ASTM A105, ASTM A350, ASTM A182 F304 and ASTM A182 F316 are the most widely used materials for making silent valve flanges.According to ANSI standard B16.5 flanges are divided into classes 150, 300, 600, 900 and 1500.The company is proud that in the last 10 years, it has been able to provide valuable services to foreign oil companies operating in Iran and other Asian countries such as Chinese companies BGP, SINOPECN, CNPC, Sinopec Shangli (SDI), Edison Italy, Liahu, Fritz offer.It should also be noted that Kara Parnian Shargh factory has succeeded in appearing in the long list of manufacturers of the Ministry of Oil (EP) system and also cooperates with Iran's oil and gas industry.