NSEN idakhazikitsidwa mu 1983, imadziwika bwino ndi ntchito yopangira ma valve a gulugufe osadziwika bwino. Pambuyo pa zaka zambiri zofufuza ndi kuchita, mndandanda wazinthu zomwe zilipo pansipa wapangidwa:

• Valavu ya gulugufe yozungulira katatu
• Valavu ya gulugufe yogwira ntchito bwino kwambiri
• Valavu ya gulugufe yachitsulo kupita kuchitsulo
• -196℃ vavu ya gulugufe ya Cryogenic
• Valavu ya gulugufe yoteteza moto kwambiri
• Valavu ya gulugufe wonyowa
• Valavu ya gulugufe yosagonjetsedwa ndi madzi a m'nyanja

Mu ntchito yaukadaulo, yang'anani kwambiri ma valve a gulugufe. NSEN ikupitilizabe kukonza ziyeneretso zake ndikutsimikizira mphamvu zake.

• Chitsimikizo cha Dongosolo

CE (PED)

ISO 9001

ISO 14001

ISO 45001

• Chitsimikizo Choteteza Moto

API 607

• Chitsimikizo Chotsika cha Utsi

API 641

ISO 15848-1

TA-LUFT

• Chitsimikizo cha ku Russia

TR CU 010 / 032

• Satifiketi ya Mayeso a TPI

Lipoti Loyesa Valavu ya Gulugufe ya Cryogenic -196

Lipoti Loyesa la Neutral Salt Spray (NSS)

Lipoti Loyesa la Kutupa kwa Intergranular (IGC)