(1) Okwu Mmalite na nke PEEML na-enweghị atụ:
GB / T8162-2008 (PEMLLE FEL FEL maka usoro eji). Eji eji eme ihe maka usoro ihe owuwu. Ihe ndị nnọchi anya ya (akara ule): carbon Ís 20, Nke 4 45 ígwè; Alloy steel Q345, 20cr, 40cr, 20crmo, 30-35crmo, 42crmo, wdg.
GB / T8163-1999 (enweghị atụ ọkpọkọ maka ibugharị mmiri). Eji tumadi iji na-ekere ihe nhicha mmiri na injinịa na akụrụngwa buru ibu. Ihe ndị nnọchi anya (akara ule) dị afọ 20, Q345, wdg.
Gb3087-2008 (pọrọ na-enweghị atụ maka ebe nrụgide dị ala). Nke kachasị eji na pipeline maka inyefe mmiri dị ala na nke na-agbadata na igwe na-emekwa ụlọ ọrụ na ndị na-ahụ maka ụlọ. Ihe nnọchi anya ya bụ nke 10 na No. 20 ígwè.
GB / T17396-2009 (na-ekpo ọkụ na-acha uhie uhie na-enweghị atụ maka mkpụrụ osisi hydraulic). A na-ejikarị ya eme ihe na-akwado hydraulic, ndị na-anya mmiri na kọlụm ndị ọzọ, yana hydraulic cydraulic cydraulic ndị ọzọ. Ihe nnọchi anya ya dị afọ 20, 45, 27SIMN, wdg.
(2) na-eji eriri nchara na-enweghị atụ: 1 4.