Dena bam golestan refining company, the only producer of road bitumen in the north of the country in Golestan industrial area of Galikash city in the year 2012 was provided. This company now has the monthly production capacity of 30,000 tons of bitumen in accordance with INSO and ASTM standards. Bitumen specialized laboratory and one of the authorized bitumen suppliers of Ministry of Roads and Urban Development, Cooperation Organization of Municipalities and Villages of the country, Foundation Islamic Revolution Housing, Small Industries and Industrial Towns Organization, Basij Construction Organization, School Renovation and Equipping Organization, etc. is. Also, during the years of 1397 to 1401, this industrial example unit company has a statue of respecting the rights and consumers with License to supply products in the Iran Commodity Exchange and obtain a license to transport goods from the country's highway and road transport organization with the name Ayman Bar Denabam Transportation Company, having 40 standard bitumen tankers with the latest modern technology, makes a significant contribution to bitumen supply. It has Semnan, Mazandaran, Golestan, North Khorasan and Razavi provinces and other parts of the country, and also exports to the countries of Turkmenistan. Uzbekistan, Afghanistan, Pakistan, Turkey, Armenia, Georgia, Kyrgyzstan and Sri Lanka. The company's laboratory unit is one of the comprehensive The most bitumen laboratories with the most successful PG laboratory devices to control all production stages from input feed to product production Finally, the storage tanks and transportation to the place of customer demand, the quality of car products is estimated in this regard by obtaining The ISO 17025 standard certificate from the National Center for Accreditation of Iran NACI and the Iranian National Standard Certificate for Quality Estimation and Assurance He considers manufactured products to be the priority of his management. Also, Denabam Golestan Polishing Company is equipped with a monitoring and control system A system in accordance with the required standards and using the most modern electrical and electronic equipment of Asman substation by experts. Accurate instruments control the parameters of temperature, pressure, volume, surface and other parameters with high safety in order to produce quality products. Obtaining standard certificates.