Established in 1987, FLEX - ING manufactures products which transfer petroleum products, gases, water and air. Located in Sherman, Texas, the company has a 26,000 - square - foot manufacturing facility. The firm offers number of products, such as dispensing hose, storage tank hardware, pipe guards/station accessories, shut-off valves, to name a few. The company is ISO 9001: 2008 certified. The firm is the member of The Association for Hose and Accessories Distribution (NAHAD), Petroleum Equipment Institute (PEI) and Underwriters Laboratory Inc.