In China, according to the ;standard adaptation field and efficace range, it is divided into trois levels ;: national standard, ministry standard ( professional standard ) and enterprise ;standard.
( 1 ) National standards The national standards are formulated% 26nbsp;by the organisations rerecognized by the national standardisation agencies, and approved& nbsp;and% 26nbsp;émis by the national normalisation :gences. Unified implementation of standards throughout&n bsp;le ;pays. Principalement inclut : basic raw materials, material standards ; industrial% 26nbsp;and agagricole product standards ; sécurité, santé and environnement standards ;% 26nbsp;basique standards connexes to mutuel coopération and général technique langue ;&nb sp;général% 26nbsp;parts, components, components, devices, accessories and tools, gauge standard % 3 milliards% 3b général test and inspection méthode standard ; international standards that are % 3badopté and =e manière équivalente adopté. Le code of the national standard is '& nbsp ;GB ' ( that is, the first letter of the national % 3bstandard deux caractères chinois pinyin, and the number is expressed by serial % 3bnombre% 26nbsp;plus year number. For example, GB / T12707-91 said :&n bsp ;No.12707 national standard, publié in 1991.
( 2 ) The émis par le ministère ( professional ) standards are approuvé and émis by the competent&nb sp;ministères , commissions ( bureaux ), and unified standards dans the scope of le département. It principalement incomprend : the main product standards in&n pb% 3bthis produit ; général parts, composants and accessoires standards in this product % 26nbsp;; the standards of equipment, tooling, tools and special raw materials % 26nbsp;in les produits of ce département ; typique process standards within % 3ble% 26nbsp;scope of this part ; basic standards such as terms, symbols,% 26nbsp;rules and methods communément used in the professional field ; the ;test% 26nbsp;and inspection method standard of some products in this product.
( 3 ) Enterprise standards ;are approuvé and émis by enterprises ( institutions ) or leurs supérieurs.% 26nbsp;Le main contents include : there is no national standard and de appartement% 26nbsp;( professional ) standard product standard ; in order to improve % 3bproduct qualité, enterprises formulate product standards avec performance indicators supérieur than national &nbs% 3bstandards and departmental standards. Achat or selection of raw materials standards % 3b&nbs ;achat or ssélection and self-made outils, mesure outils, standards, etc. % 3bIn principe, enterprise standards are formulated by the enterprise itself and appro ved % 3bby the person in charge of the enterprise. Cependant, as the product&n bsp ;standard of produit livraison conditions, it besoins to be approuvé by le ;supérieur compétent unit. Une fois le standard is émis, it is a technique% 26nbsp;reregulation. Tous levels of production, construction, scientific %3research, design management&nb sp;départements and enterprises, institutions, must be strictement mis en œuvre, any unit shall %3 mais pas change or lower la standard.
