1, ho'āʻo haku mele

1.according i ka haku mele 'ana a me ka mechanical waiwai o ka home seamless paipu, e like me 10, 15, 20, 25, 30, 35, 40, 45 a me 50 kila kemika hui pono e hoʻokō i nā mea o GB / T699-88.Imported. e nānā ʻia nā paipu ʻole e like me nā kūlana kūpono i ʻōlelo ʻia ma ka ʻaelike.

2. E nānā i ka gb223-84 "Methods for Chemical Analysis of Steel and Alloy" no nā ʻano loiloi kikoʻī.

3. ka nānā 'ana o ka deviation e like me GB222-84 "kemika kila me nā la'ana a me ka pau huahana kemika haku mele deviation".

2、hōʻike hana kino

1.according i ka hana o ka home seamless paipu lako, maʻamau kalapona kila e like me GB / T700-88 papa A kila manufacturing (akā, pono e hōʻoia i ka sulfur maʻiʻo 'aʻole ma mua o 0.050% a me ka phosphorus maʻiʻo 'aʻole ma mua o 0.045%), pono kona mau waiwai me ka waiwai i kuhikuhi ʻia ma ka papa ʻaina GB8162-87.

2.according i ka wai ho'āʻo ho'āʻo lako o ka home seamless paipu pono e hōʻoia i ka maʻamau o ka wai ho'āʻo kaomi.

3. E ho'okō 'ia ka nānā 'ana i ka hana kino o ka paipu seamless i lawe 'ia e like me nā kūlana kūpono i 'ōlelo 'ia ma ka 'aelike.