1. Isici esiyinhloko evamile evamileamashubhu ensimbi angenamthungo ukuthi azinayo i-welding seams futhi angakwazi ukumelana nokucindezela okukhulu.Umkhiqizo ungaba uphonswa olubi kakhulu noma udonswe ngokubanda.

2. Ubukhulu bembobo yangaphakathi kanye nodonga lwangaphandle lwepayipi lensimbi eliqinile elidonsayo linokubekezelela okuqinile kanye nobulukhuni.

Izici zamashubhu ensimbi adonswe ngokubanda (agoqiwe):

1. I-diameter yangaphandle incane;

2. Ukunemba okuphezulu kungasetshenziselwa ukukhiqizwa kwenqwaba encane;

3. Imikhiqizo eqediwe edonswe ngokubanda (egoqiwe) inokunemba okuphezulu kanye nekhwalithi enhle yendawo;

4. Indawo ye-cross-sectional yepayipi yensimbi iyinkimbinkimbi kakhulu;

5. Ukusebenza kwepayipi yensimbi kuphakeme kakhulu, futhi insimbi iminyene kakhulu.