Check valve API 624 detection
Tianjin Rong Da Testing Co., Ltd. contact: Wang Jingfu
Cell phone: 13102238283 QQ:3144667033
Tel: 022-23892103 WeChat: 13102238283
API 642 test:
Project Name: the type test of the valve with FE graphite packing lift lever
Detection purpose: the production process of valve stem packing volatile leakage
Detection range: safety valve, ball valve, butterfly valve, etc.
Project Description: API 624 standard clear with graphite packing of the Ming rod and the lifting of the rotary stem valve of the low leakage type test requirements and acceptance criteria (100ppmv), before the API622 to test the. Packing should meet -29 to 538 degrees Celsius (20 degrees Fahrenheit to 1000 DEG C - Fahrenheit) use. This type of test contains requirements that are in accordance with the principles of EPA21. Valve size greater than NPS24 or pressure greater than class 1500 is not within this standard.
API 642 result evaluation:
1 methane leakage in the test process;
2 after testing the valve of the various parts of the inspection.
API 642 main content:
(1) the test range includes a valve lifter by graphite packing API622 test emission type test;
(2) random sampling valve;
(3) the test medium is methane or helium (97%);
(4) test pressure for rated working pressure (ASMEB16.34);
(5) the test temperature is 260. Helium can be used;
(6) mechanical circulation 310;
(7) thermal cycling 3;
(8) the leakage rate is not specified