Company Profile

About Cangzhou Silver Valley

Cangzhou Silver Valley Technology CO., LTD is located in Lijiapu Industry, known as the"Capital of Pipe Fittings in China". It is a comprehensive enterprise integrating research and development, pro-duction, sales, quality inspection, packaging, and trans- portation.

Our company mainly produces and exports steel pipes,flanges,and pipe fittings,which are widely used in shipbuilding,chemicals,oil,electricity,gas,water supply,and other fields.It has established long-term strategic cooperative relationships with many domestic and foreign companies.

As one of the company's core products,steel pipes have a constant inventory of over 500,000 tons.The company produces various types of steel pipes,includ- ing seamless steel pipes,spiral steel pipes,and straight-seam steel pipes,to meet the needs of different customers.These products are strictly produced according to industry standards such as API5L, API5CT, ANSI, ASME, EN, DIN, GOST, JIS, KS, BS, ensuring that product quality meets customer require-ments.

Factory Show

Production Process

Seamless steel pipes are made by hot - rolling (heating billet, piercing, rolling) or cold - drawing (pulling pre - formed tube through die).

Hot-Rolling Process

1. Billet Preparation: High-quality steel billets (carbon or alloy steel) are selected based on final product requirements.

2. Heating: Billets are heated to 1200-1300°C to make the steel malleable.

3. Piercing: A piercing mill (e.g., Mannesmann mill) is used to pierce the heated billet, creating a hollow shell.

4. Rolling: The hollow shell is rolled through stretch-reducing or sizing mills to control diameter and wall thickness, achieving desired dimensions and properties through multiple passes.

Cold-Drawing Process

1. Tube Selection: A pre-formed seamless tube (initially hot-rolled) is chosen.

2. Preparation: The tube surface is cleaned and lubricated to ensure smooth drawing and reduce friction.

3. Drawing: The tube is pulled through a smaller die, reducing diameter and wall thickness. Multiple passes may be needed to achieve final dimensions. Cold-drawing enhances surface finish, dimensional accuracy, and mechanical properties (e.g., tensile strength, hardness).

Production Equipment

Testing Equipment