Corrosion Coupons are used to monitor the corrosion rates of sample (coupon) in the pipe or container. By observing the mils-per-year corrosion rate of an exposed coupon, valuable information can be provided regarding the material's life expectancy. Sampling & Injection Systems are used to get medium sample from pipe or inject the chemicals into the pipe. Access fitting bodies can be welded or flange-mounted. High pressure access system consist of three basic components: 1, an Access Fitting Body 2, a Plug Assembly 3, a Cover The Internal Assembly of Corrosion Coupons consists of: 1. hollow plug body, 2. coupon holder 3. coupon inside. corrosion probes test the corrosion by monitoring the permeation of hydrogen. Access fitting bodies can be welded or flange-mounted. The installation assembly consists of: 1. access fitting body, 2. protective cover, 3. probe, 4. hollow plug body 5. temperature & pressure gauge assembly. Test; Gas tight test of probe. The Internal Assembly of Sampling & Injection Systems consist of 1. solid plug body, 2. injection nut and injection tube; The External Assembly consists of 1. nipple 2. valve.