National standard carbon steel elbow production st

National standard carbon steel elbow is a common pipe connection accessories, widely used in petroleum, chemical, electric power, metallurgy and other industries. Production standards are of great significance to ensure the quality and stability of products. This paper will introduce the production standard of national standard carbon steel elbow in detail.

First, material selection

The production material of carbon steel elbow should meet the requirements of relevant standards, and the common materials are Q235, 20#, A105 and so on. The material should have good mechanical properties, corrosion resistance and weldability.

2. Appearance requirements

The appearance of the GB carbon steel elbow should be free from cracks, wrinkles, slag inclusion, burning and other defects, and the surface should be smooth without obvious bumps and burrs. The incision of the elbow should be level and regular, without cutting burrs.

Three, size requirements

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