Ipayipi lensimbi elingenamthungo elisetshenziswa kabanzi emhlabeni liyipayipi lekhwalithi ephezulu futhi lisetshenziswa kabanzi embonini, embonini yamakhemikhali, ekwakheni nakweminye imikhakha. Amapayipi ensimbi angenamthungo ayathandwa yimboni ngenxa yamandla awo aphezulu, ukumelana nokugqwala, kanye nokumelana nokushisa okuphezulu. Kukhona nezindinganiso ezifanayo ngokwezincazelo kanye nobukhulu bodonga. Okulandelayo uhlu lwezincazelo zomhlaba wonke zamapayipi ensimbi angenamthungo kanye nezindinganiso zobukhulu bodonga:
Imininingwane:
1. Izindinganiso zaseMelika:I-ASTM A106, I-ASTM A53, I-API 5L, I-ASTM A192,I-ASTM A210, I-ASTM A213, njll.;
2. Izindinganiso zaseJapane: JIS G3454, JIS G3455, JIS G3456, JIS G3461, JIS G3462, njll;
3. Izindinganiso zesiJalimane: I-DIN 1626, i-DIN 17175, i-DIN 2448, i-DIN 2391, njll.;
4. Izindinganiso zaseBrithani: BS 1387, BS 3601, BS 3059, BS 6323, njll.;
5. Izindinganiso zaseYurophu:I-EN 10210, EN 10216, EN 10297, njll.;
6. Izindinganiso zaseShayina:I-GB/T 8162, GB/T 8163, GB/T 3087, GB/T 5310, GB/T 6479, njll.
Izinga lokujiya kodonga:
1. SCH10, SCH20, SCH30, SCH40, SCH60, STD, SCH80, XS, SCH100, SCH120, SCH140, SCH160, XXS, njll.;
2. Isisindo: 2.0-60mm, SCH10S, SCH40S, SCH80S, njll.;
3. Uma kwenzeka ukuntuleka kwezinto zokusetshenziswa noma isidingo esikhulu, amanye amapayipi amancane kungadingeka enziwe ngokwezifiso ngokwezidingo ezithile.
Lokhu okungenhla yizincazelo kanye nezindinganiso zobukhulu bodonga lwamapayipi ensimbi angenamthungo aphesheya kwezilwandle. Izimboni ezahlukene kanye nezidingo zokusetshenziswa zidinga ukukhethwa kwezincazelo ezifanayo kanye nobukhulu bodonga. Ungakhetha izincazelo ezifanela izidingo zakho zokuthenga.