... F12,F11,F22,F5,F9,F91,Etc)QualificationISO9001:2008 Quality Mangement System Certificate,ISO 14001 Environment Mangement System Certificate ... Mangement System Certificate, acquired the license for manufacturing special pressure Pipline equipments from AQSIQ , passed the Authentication of API ... ,black painted,as per customer's request.4,high-temperature resistant with black painting.5,marking:acorrding ...