The working principle and use of pressure pipe expansion joint
Pressure pipe expansion joint should have a special storage rack, which should be wooden or painted carbon steel bracket or rubber pad to isolate it from other metal materials such as carbon steel. When stored, the storage orientation should be convenient for lifting, and the pressure pipe expansion joint should be relatively isolated from other material storage areas and should be protected to avoid contamination of stainless steel by dust, oil and rust. When lifting, special lifting tools should be used, such as sling, etc., to stop the use of steel wire rope to avoid scratching the surface; and in lifting and placing, pressure pipe expansion joint should avoid impact bumping constitutes a scratch. When transporting, the pressure pipe expansion joint should be transported with something (such as a cart, battery car, etc.) and should be clean with isolation protection methods to prevent dust, oil and rust from contaminating the stainless steel.
Pressure pipeline expansion joint stop delay, avoid bumping, scratching. After careful investigation with the naked eye, supplemented by a number of customary testing tools, and against the fulfillment of specifications, the user can easily discern from the appearance of the pressure pipe expansion joint products in hand whether they are classified as standard qualified products, qualified manufacturers have a more stringent quality inspection process when leaving the factory. The product can withstand inspection. At least in the appearance and scale will not have too much error, the investigation of the appearance is a more useful primary inspection methods. In practice, the acquirer may not have the opportunity to conduct a comprehensive chemical analysis test on the pressure pipe expansion joint to be purchased.
The more common practice is to buy the customary stainless steel raw material testing solution to quickly and visually test the chemical reaction of the pressure pipe expansion joint. For example, when a certain reagent is dropped onto the exterior of the pressure pipe expansion joint, the pressure pipe expansion joint turns dark brown and the pressure pipe expansion joint turns red, so that the characteristics of the raw material can be initially identified. Of course, the specific chemical reaction still depends on the instructions of the reagent, not to be confused. In this way, when quality problems arise, raw materials do not meet the specifications or other disputes, can be negotiated or legal recourse to minimize the danger and loss.
First of all, from the appearance of the product against industry norms to determine whether the product meets the quality requirements, followed by the conditions of the choice of severe chemical parameters test to determine the norms of raw materials, no conditions can use conventional chemical reagents in the field of raw materials for a simple identification.
Tests acquired in third-party channels, is also a useful way to avoid the danger. In this way, the maximum limit to ensure that we acquire pressure pipe expansion joints smooth and satisfactory. The advantages of pressure pipe expansion joints are more obvious when doing 8k treatment. After the pressure pipe expansion joint appearance treatment, then do the welding, generally only need a processing to reach the mirror surface effect. Now the most common welding process in the market is to use nitric acid with iron oxide red, this processing method consumes less, the cost of equipment is low, and thus the overall grinding cost is low, so the pressure pipe expansion joint is also widely used.
