KST, the deflagration index of a dust, is a generalized number used to estimate the anticipated behavior of dust deflagration or explosion. It indicates a dust’s approximate explosive power compared to other dusts.
During KST testing the following are analyzed:
1) Minimum Dust Concentration
2) Minimum Ignition Temperature
3) Minimum Ignition Energy
KST testing is conducted by:
1) Testing bulk samples of dust between 2-2.5lbs for a general NFPA-classified KST number.
2) The samples of dust are taken from several locations such as ceilings, ductwork and corners.
3) The dust is ignited in a clear cylinder and measured.
|KST 0||0||No explosion|
|KST 1||> 0 and ≤ 200||Weak explosion|
|KST 2||> 200 and ≤ 300||Strong explosion|
|KST 3||> 300+||Very strong explosion|
|KST Categories & Explosiveness|