Yayin da buƙatun mutane don kare muhalli ke ƙara yin ƙarfi, buƙatun don bawul ɗin kuma suna ƙaruwa, kuma abubuwan da ake buƙata don ƙyale matakin ƙyalli masu guba, masu ƙonewa da fashewar abubuwa a cikin tsire-tsiren petrochemical suna ƙara ƙarfi.Bawuloli kayan aiki ne masu mahimmanci a cikin tsire-tsire na petrochemical., Ire-irensa da yawansa suna da girma, kuma yana daya daga cikin manyan hanyoyin zubewar na'urar.Don kafofin watsa labaru masu guba, masu ƙonewa da fashewar abubuwa, sakamakon ɗigon waje na bawul ɗin ya fi tsanani fiye da ɗigon ciki, don haka buƙatun ɗigo na waje na bawul ɗin suna da mahimmanci.Ƙarƙashin ƙyalli na bawul yana nufin cewa ainihin magudanar ruwa kaɗan ne, wanda ba za a iya ƙayyade shi ta hanyar matsa lamba na ruwa na al'ada da gwajin hatimin iska ba.Yana buƙatar ƙarin hanyoyin kimiyya da nagartattun na'urori don gano ƙananan yabo na waje.

Ka'idodin da aka saba amfani da su don gano ƙananan yabo sune ISO 15848, API624, Hanyar EPA 21, TA luft da Kamfanin Mai Shell SHELL MESC SPE 77/312.

Daga cikin su, ajin ISO yana da mafi girman buƙatu, sai kuma SHELL aji A. A wannan karon,NSEN ta sami daidaitattun takaddun shaida masu zuwa;

TS EN ISO 15848-1

Bayani na API641

TA-Luft 2002

Don saduwa da buƙatun ƙananan ɗigogi, simintin gyare-gyaren bawul yana buƙatar biyan buƙatun gwajin iskar helium.Saboda nauyin kwayoyin halittar helium ƙanana ne kuma mai sauƙin shiga, ingancin simintin shine mabuɗin.Abu na biyu, hatimin da ke tsakanin jikin bawul da murfin ƙarshen shine sau da yawa hatimin gasket, wanda shine hatimin a tsaye, wanda yake da sauƙin cika buƙatun ɗigo.Bugu da ƙari kuma, hatimin da ke kan tushen bawul ɗin hatimi ne mai ƙarfi.Ana iya fitar da sassan graphite cikin sauƙi daga cikin marufi yayin motsi na tushen bawul.Sabili da haka, ya kamata a zaɓi marufi na ƙanƙanta na musamman kuma ya kamata a sarrafa sharewa tsakanin marufi da bututun bawul.Tsare-tsare tsakanin hannun rigar matsa lamba da bututun bawul da akwatin shaye-shaye, da sarrafa roughness na bawul ɗin tushe da akwatin shaƙewa.