Quality testing of large caliber carbon steel elbo

Quality testing of large caliber carbon steel elbow

The quality inspection of large caliber carbon steel elbow should be carried out in the supplier's technical quality supervision part.It is necessary for the supplier to ensure that the large-caliber carbon steel elbows are delivered in accordance with the relevant product specifications.The buyer has the right to inspect and inspect according to the corresponding product specifications.Large caliber carbon steel elbows shall be submitted for inspection in batches, and the batch rules shall conform to the rules of the corresponding product specifications.The inspection items, sampling quantity, sampling location and test method of large caliber carbon steel elbow shall be in accordance with the rules of the corresponding product specifications.Hot rolled seamless large diameter carbon steel elbows can be used for batch sampling with the buyer's approval.Large caliber elbow style results, a product does not conform to the specifications of the rules, should be unqualified to pick out, and from the same batch of large caliber elbow arbitrary take out double the number of style, unqualified items for re-inspection.For large caliber elbows whose reinspection results are not suitable, the supplier may submit them for inspection one by one or conduct heat treatment from scratch, but the number of initio treatment shall not exceed two times, and a new batch of elbow shall be submitted for inspection.If there is no special rule in the product specification, the chemical composition of the large caliber elbow shall be checked according to the smelting composition.The above is the introduction of the quality testing of the company's production of large caliber elbow elbow manufacturers to explain the material of the problem

Elbow materials include cast iron, stainless steel, alloy steel, malleable iron, carbon steel, nonferrous metal and plastic, etc.There are direct welding (commonly used) flange connection, hot melt connection, electric fusion connection, threaded connection and socket connection, etc.According to the production process can be divided into: welding elbow, stamping elbow, push elbow, casting elbow, etc.Other names: 90 degree bend, right Angle bend, love and love bend, etc.

Description: elbow is a kind of pipe fitting commonly used in plumbing installation. It is used to connect the bend of the pipe and change the direction of the pipe.Other names: 90° elbow, right Angle bend, love bend, stamping elbow, press elbow, machine elbow, welding elbow, etc.

Purpose: To connect two pipes of the same or different nominal diameter, to make the pipes turn at 90°, 45°, 180° and various degrees.Bending radius less than or equal to 1.5 times of pipe diameter belongs to elbow, greater than 1.5 times of pipe diameter belongs to elbow.

2601-2602.