Mtengo wa ERWndi izi:
API 5L, ASTM A53 B, ASTM A178, ASTM A500/501, ASTM A691, ASTM A252, ASTM A672

API 5L Standard ikufuna gasi ndi madzi mumakampani amafuta ndi gasi omwe amagwiritsidwa ntchito ngati chitoliro chopanda chitsulo ndi chitoliro chowotcherera, kuphatikiza doko wamba ndi doko, doko la socket doko ndi chubu cholunjika (TFL) ndi doko lomwe lili ndi zina. kugwirizana chubu processing.

Chitoliro cha ASTM A53 chimapangidwa kuti chizigwiritsidwa ntchito pamakina ndi kukakamiza komanso chovomerezeka kuti chigwiritsidwe ntchito wamba mumizere ya nthunzi, madzi, gasi ndi mpweya.

Miyezo ya ASTM A178 yamachubu amagetsi osakanizidwa ndi machubu okhala ndi makulidwe ochepa-pakhoma opangidwa ndi chitsulo cha kaboni ndi chitsulo cha carbon-manganese kuti agwiritsidwe ntchito mu machubu otenthetsera, zitoliro zowotchera, zitoliro zotentha kwambiri, ndi malekezero otetezeka.

ASTM A500 imakwirira zitsulo zoziziritsa kukhosi zozungulira komanso zopanda mpweya wa kaboni, masikweya, amakona anayi, kapena machubu apadera omangira milatho ndi nyumba zomangika, zomangika, zomangika kapena zomangika, komanso pazolinga zonse.

ASTM A691 imakwirira chitoliro cha kaboni ndi aloyi chitsulo, chophatikizika chamagetsi chophatikizika ndi chitsulo chodzaza, chopangidwa kuchokera ku mbale yoponderezedwa yokhala ndi zowunikira zingapo ndi milingo yamphamvu komanso yoyenera kugwirira ntchito pamatenthedwe apamwamba kwambiri.

ASTM A252 imakwirira milu yapaipi yachitsulo yomwe silinda yachitsulo imagwira ntchito ngati membala wonyamula katundu wokhazikika kapena ngati chipolopolo kuti apange milu ya konkriti.

ASTM A672 imakwirira chitoliro chachitsulo chamagetsi chophatikizika ndi chotenthetsera chapakatikati pa kutentha kocheperako.