As per our country’s national standards, there are eight distinct explosion-proof categories: flameproof “d”, increased safety “e”, intrinsic safety “I”, pressurized “p”, oil-immersed “o”, sand-filled “q”, non-sparking “n”, and special “S” type.
| Plahvatuskindel tüüp | Gaasi plahvatuskindluse sümbol | Tolmuplahvatuskindel sümbol |
|---|---|---|
| Tõrkekindlad tüübid | ia, ib, ic | ia, ib, ic, iD |
| Näide | ma, mb, mc | ma, mb, mc, mD |
| Barotroopne tüüp | px, py, pz, pxb, pyb, pZc | p; pb, pc, pD |
| Kõrgendatud ohutustase | e, eb | / |
| Põlemiskindel tüüp | d, db | / |
| Õlile kastetud tüüp | o | / |
| Liivaga täidetud vorm | q, qb | / |
| N-tüüp | nA, nC, nL, nR, nAc, nCc, nLc, nRc | / |
| Eriline tüüp | S | / |
| Korpuse kaitseklass | / | ta, tb, tc, tD |
In the realm of instrumentation, the predominant types employed are flameproof “d” and intrinsic safety “i”.
