Ona o le tele meafaigaluega tonnage manaomia mo le hydraulic bulging faagasologa otie uamea, e masani ona faʻaaogaina mo le gaosiga o le uʻamea uʻamea ma le mafiafia puipui masani e itiiti ifo i le dn400 i Saina.

O mea e faʻaogaina e faʻaaogaina e maualalo le carbon steel, uʻamea uʻamea maualalo ma uʻamea e leai se mea e faʻafefe ai galuega malulu, e aofia ai nisi mea e le uʻamea, e pei o le kopa, alumini, titanium, ma isi.

E tusa ai ma le tulaga o le gaosiga, e mafai ona vaevaeina i tulaga o le atunuu, tulaga eletise, tulaga vai, American Standard, tulaga Siamani, tulaga Iapani, tulaga Rusia, ma isi, e pei ona taua i lalo: GB / t12459, GB / T13401, ASME B16 9, SH3408, SH3409,HG/T21635,DL/T 695,SY/T 0510,DIN 2615.