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Qingdao Longchang Jie Machinery Co., Ltd. is a modern enterprise in the plastic machinery industry that integrates new product research and development, design, production and sales. Our company has formed three major series of plastic extrusion production lines based on pipe production lines, sheet production lines and profile production lines.

The PP pipes produced by Longchangjie Machinery have excellent performance. However, to select high-quality PP pipes (polypropylene pipes), a multi-dimensional evaluation is required. The following mainly focuses on the comprehensive appearance, physical properties, combustion characteristics, and national standards for identification

The spiral steel pipes produced by Longchangjie Machinery Co., Ltd. are widely used in various fields. To ensure their service life, purchasers carry out regular maintenance to remove rust from the spiral steel pipes. The following are the main aspects involved in the rusting process characteristics of spiral steel pipes:

Longchangjie is a producer and manufacturer of PP pipes in Qingdao, China. This type of pipe production is applied in various fields. The following mainly discusses the application of PP pipes in the chemical industry.

The rolling bearings produced by Longchangjie Machinery, as core components of precision machinery, achieve efficient anti-friction between the shaft and the shaft housing through a unique structural design. This bearing is mainly composed of an inner ring, an outer ring, rolling elements and a cage.The following are the specific functions of rolling bearings:

In daily engineering and life scenarios, we often use PP pipes and PVC pipes. The differences between these two types of pipes in practical applications are worth our in-depth understanding.