Freet Pipe manufacturing industry (Freet Pipe for short) is composed of two production bases: Qilu Chemical Industrial Zone in Zibo and Shengli Industrial Park in Dongying. The company is equipped with the most advanced CNC thread processing lathe, 600 mm digital tool measuring projector, (full tube phased array) ultrasonic flaw detector, pipe end magnetic particle flaw detector, anti-corrosion oil pipe coating monitor, thermal insulation oil pipe apparent thermal conductivity tester, microcomputer monitoring hydraulic screwing machine and large diameter full-length hydrostatic test equipment, In important production links, a number of on-line inspection means such as full-length diameter, non-destructive testing, wall thickness testing, single thread data measurement, hydrostatic test, weighing and length measurement are set up to ensure that the product quality meets the standards and customer requirements. It has formed an efficient industrial chain of "integration of manufacturing, processing and service".

Located in Qilu Chemical Industrial Zone, Linzi District, Zibo City, Zibo Freet Thermal Tech Co., Ltd. covers an area of 245000 square meters. It has two most advanced professional production lines of insulating oil casing at home and abroad, with an annual output of 1 million meters of insulating oil casing ranging from 73mm to 178mm; There are 8 specialized production lines for API standard oil casings, with an annual output of 120000 tons for all kinds of API standard oil casings and special thread oil casings; There is a heat treatment production line supporting API standard oil casing production, with an annual treatment capacity of 80000 tons; There are 4 pipe end thickening production lines with an annual processing capacity of 60000 tons; There are 2 production lines for inner anti-corrosion and wear resistance of oil pipes, which can produce 1 million meters of special oil pipes with inner coating and lining annually; There is a production line for coupling and heat insulation bushing, with an annual production capacity of 1 million. At the same time, the company also has a professional R & D center and a complete set of physical and chemical laboratories.

Located in Dongying Shengli Industrial Park, Shengli Oilfield Freet Petroleum Steel Pipe Co., Ltd was established in September 2006. In accordance with the requirements of "high level and specialization", we have successively imported advanced equipment from the United States and Japan, and built the first domestic ERW high frequency straight welded pipe production line capable of producing N80 steel grade, with an annual production capacity of 120000 tons, covering J55, N80 and other steel grades; At the same time, it has five casing thread processing production lines, two coupling processing production lines and one oil special casing heat treatment production line, covering a wide range of products φ 114mm— φ 508mm H40, J55, K55, N80, L80, C90, T95, P110, q125, V140 and other steel grade API oil casings and couplings, as well as non API series (including Russian gost standard oil casings, special oil deduction casings, expansion casings, heat resistant casings, high steel grade casings, etc.) oil special pipe products, with an annual processing capacity of 200000 tons of casings, 100000 tons of pipe body heat treatment and 500000 couplings.

The company has passed API logo certification, API Q1 system certification, ISO9001 quality management system certification, environment and occupational health and safety management system certification, and gost certification in Russia. It has the network access qualification of CNPC and Sinopec, and has become the qualified supplier of shell Oman, German iteco, Argentina YPF, Venezuela PDVSA and other companies. At the same time, the company has independent research institute of petroleum special pipe and imported Mori precision CNC lathe, set up special thread casing processing production line, and focus on developing non-standard and special thread technology products. The company's products gradually develop towards high quality and variety, and constantly improve the company's core competitiveness.

In 2008, the company was recognized as a state-level high-tech enterprise, and in 2009, it was approved to establish a provincial "enterprise technology center" and "academician workstation for petroleum management". In July 2010, the company was officially awarded the "National 863 plan expansion pipe technology special pipe production base".