The company 's founding .
It has built approximately 50,000 miles ( 80,000 km ) of pipeline systems , more than 50 major oil and gas field developments , and completed over 380 major chemical and petrochemical projects .
Since the company 's founding , it has built approximately 50,000 miles ( 80,000 km ) of pipeline systems , more than 50 major oil and gas field developments , and completed over 380 major chemical and petrochemical projects .