Quality inspection flange fittings are an important part of the sale process, comply with industry-accepted norms regulate and enforce strict inspection operations is to ensure that the best interests of the supply and demand sides of way. Today we introduce the inspection process large-diameter flange fittings. As the saying goes: "No hard pentameter are six law" clearly a test specification pipe flanges after (This specification covers carbon steel, alloy steel and other raw materials inspection flanged pipe fittings), take a look at the specific The operation flow. All processes often contain several elements the following: the appearance of quality, commodity raw materials, scale standardized, commodity symbols, merchandise packaging. In each examination must comply with the appropriate specifications. About flanged fittings, the surface quality and flatness refers lubrication commodity appearance, specifically, commodity appearance without cracks, burnt or other appearance defects affect commodity strength. In addition, corrosion and mechanical damage to one of the elements is checked. About Carbon raw commodities, the appearance of rust should be flat lubrication, no falling appearance. Commodity raw material inspection certificate data mainly refers to the manufacturer, such as the use of foreign-made materials to replace the information needs of customers, but also supply specific data on the mechanical properties and chemical composition to ensure that fit the needs of commodity contracts in the corresponding specification. Scale Standard flange goods should be strictly in accordance with the rules of the contract data to test, if there are special needs, the need clearly documented inspection process. Commodity symbol has two effects logo merchandise display manufacturers specifications and brand, should be strictly in accordance with the relevant rules of the contract for processing. On the packaging, the need for testing according to different conditions, such as the use of space for packaging boxes, scale spaces between the pieces must be less than the smallest scale, which is the process in order to avoid any damage to the merchandise attack bump each other. And on wooden packaging, boxes of goods have strong fixed to avoid bump damage. 

palabras clave: Large-diameter flange, large diameter flanges, forged large-diameter flange,