Umbhobho wentsimbi engenamthungo osetyenziswa kakhulu kwihlabathi liphela ngumbhobho osemgangathweni ophezulu kwaye usetyenziswa kakhulu kushishino, kushishino lweekhemikhali, kulwakhiwo nakwezinye iindawo. Imibhobho yentsimbi engenamthungo iyathandwa lishishini ngenxa yamandla ayo aphezulu, ukumelana nokugqwala, kunye nokumelana nobushushu obuphezulu. Kukwakho nemigangatho ehambelanayo ngokweenkcazo kunye nobukhulu bodonga. Olu lulandelayo luluhlu lweenkcukacha zamazwe ngamazwe zemibhobho yentsimbi engenamthungo kunye nemigangatho yobukhulu bodonga:
Iinkcukacha:
1. Imigangatho yaseMelika:I-ASTM A106, I-ASTM A53, I-API 5L, I-ASTM A192,I-ASTM A210, I-ASTM A213, njl. njl.;
2. Imigangatho yaseJapan: JIS G3454, JIS G3455, JIS G3456, JIS G3461, JIS G3462, njl.;
3. Imigangatho yesiJamani: I-DIN 1626, i-DIN 17175, i-DIN 2448, i-DIN 2391, njl.;
4. Imigangatho yaseBritane: BS 1387, BS 3601, BS 3059, BS 6323, njl.njl.;
5. Imigangatho yaseYurophu:EN 10210, EN 10216, EN 10297, njl.njl.;
6. Imigangatho yamaTshayina:GB/T 8162, GB/T 8163, GB/T 3087, GB/T 5310, GB/T 6479, njl.
Umgangatho wobukhulu bodonga:
1. SCH10, SCH20, SCH30, SCH40, SCH60, STD, SCH80, XS, SCH100, SCH120, SCH140, SCH160, XXS, njl.;
2. Ubunzima: 2.0-60mm, SCH10S, SCH40S, SCH80S, njl.;
3. Kwimeko yokunqongophala kwezinto eziluhlaza okanye imfuneko enkulu, eminye imibhobho emincinci inokufuneka yenziwe ngokwezifiso ngokweemfuno ezithile.
Ezi zingentla ziinkcazo kunye nemigangatho yobukhulu bodonga lweepayipi zentsimbi ezingenamthungo zamazwe ngamazwe. Amashishini ahlukeneyo kunye neemfuno zokusetyenziswa zifuna ukukhethwa kweenkcukacha ezifanelekileyo kunye nobukhulu bodonga. Ungakhetha iinkcukacha ezihambelana neemfuno zakho zokuthenga.