American Parr Fully Automatic Surfacing Layer Hydrogen Stripping Test (HID) Test System Sample

Application areas and specific applications

Parr company recently introduced an automatic reaction system, which is a fully automatic surfacing layer hydrogen peel test (HID) test system specially designed for ASTM G146 standard. This system can be widely used in different pressure, temperature, cooling rate and hydrogen-containing environments that may be harmful due to hydrogen stripping. These tests can be used to evaluate the effects of material composition, processing methods and manufacturing processes, heat treatment, hydrogen pressure, operating temperature, and cooling rate. This test method is described in detail in the ASTM G146 standard.

The HID test system is used to study the state of bimetallic samples under high temperature and high pressure hydrogen refining conditions. By setting a certain test temperature and hydrogen pressure to simulate the actual environment in the refining furnace, the temperature is generally 300 to 500 ℃, the hydrogen pressure is generally 14 to 20 MPa, up to 34.5MPa. The purpose of this test is to test the resistance of the bimetallic stainless steel alloy to hydrogen stripping in various laboratories.

HID test system mainly includes

1. High temperature and high pressure test device

a. High temperature and high pressure reactor, made of nickel 625 or stainless steel 316, temperature and pressure can reach 500 ℃, 34.5MPa,

b. Anti-hydrogen peeling test unit,

c. Reactor data control and collection system;

2. Gas booster

a. Gas booster pump,

b. Gas cylinder (nitrogen or compressed air);

3. Auxiliary device

Back pressure valve, automatic pressure control valve, workbench, connecting pipeline, pressure gauge, valve, filter, etc.

Working principle and process of HID test system

The control system of the HID test system can automatically replace the air in the container with argon, perform high-pressure leak detection with nitrogen, and then test according to the procedure. The main step of the test is to fill the pressure vessel with the test sample with hydrogen, heat to the set temperature and maintain it for a certain period of time. After that, the container will be cooled at a preset rate, such as 150 ℃ / h, until the temperature inside the container drops to 200 ℃. Then the test unit is automatically depressurized, the reaction gas is discharged and further cooled, so that the test sample can be safely taken out. All important test parameters can be set freely.