Umbhobho wentsimbi ongenamthungo osetyenziswa kakhulu kwihlabathi ngumbhobho okumgangatho ophezulu kwaye usetyenziswa kakhulu kumashishini, kwishishini lemichiza, ekwakhiweni nakwezinye iindawo.Imibhobho yentsimbi engenamthungo ithandwa lishishini ngenxa yamandla ayo aphezulu, ukuxhathisa ukubola, kunye nokumelana nobushushu obuphezulu.Kukho nemigangatho ehambelanayo ngokubhekiselele kwiinkcazo kunye nobukhulu bodonga.Olu lulandelayo luluhlu lwemilinganiselo yemibhobho yentsimbi engenamthungo yamazwe ngamazwe kunye nemigangatho yobukhulu bodonga:
Iinkcukacha:
1. Imigangatho yaseMelika:I-ASTM A106, I-ASTM A53, API 5L, ASTM A192,I-ASTM A210, I-ASTM A213, 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 yaseBrithani: BS 1387, BS 3601, BS 3059, BS 6323, njl.;
5. Imigangatho yaseYurophu:EN 10210, EN 10216, EN 10297, njl.;
6. Imigangatho yamaTshayina:GB/T 8162, GB/T 8163, GB/T 3087, GB/T 5310, GB/T 6479, njl.
umgangatho wodonga:
1. SCH10, SCH20, SCH30, SCH40, SCH60, STD, SCH80, XS, SCH100, SCH120, SCH140, SCH160, XXS, njl.;
2. I-WT: 2.0-60mm, SCH10S, SCH40S, SCH80S, njl.;
3. Kwimeko yokunqongophala kwezinto ezibonakalayo okanye imfuno enkulu, ezinye iibhobho ezincinci zingadinga ukulungiswa ngokweemfuno ezithile.
Ezi zingentla zinkcukacha kunye nemigangatho yobukhulu bodonga lwemibhobho yentsimbi engenamthungo yamazwe ngamazwe.Amashishini ahlukeneyo kunye neemfuno zokusetyenziswa zifuna ukukhethwa kwezinto ezihambelanayo kunye nobukhulu bodonga.Unokukhetha iinkcukacha ezihambelana neemfuno zakho zokuthenga.