GB/T 34693-2017 in English

GB/T 34693—2017 Standard Overview

This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage of chlorinated polyvinyl chloride resins, and is applicable to chlorinated polyvinyl chloride resins obtained by chlorination of polyvinyl chloride resins.

Standard Development Background and Technology Evolution Analysis

Chlorinated polyvinyl chloride resin (CPVC) is an important plastic material widely used in industry and construction. With the growth of market demand and technological advancement, GB/T 34693—2017 came into being, replacing the old version of the standard to meet higher quality and performance requirements.

Physical and Chemical Properties Comparison Table

Test methods and testing instruments

The test methods mentioned in the standard include:

• GB/T 7139 Determination of chlorine content
• GB/T 9348 Determination of impurity particle number
• GB/T 20022 Determination of apparent density
• GB/T 34694 Determination of residual chlorine (potentiometric titration)
• GB/T 2914 Determination of volatile matter

Implementation suggestions and precautions

To ensure the correct implementation of the standard, it is recommended that:

1. Test strictly in accordance with the test methods specified in the standard.
2. Manufacturers should establish a sound quality control system.
3. During the sampling process, pay attention to the representativeness of the sample.
4. Data revision and judgment shall be carried out in accordance with GB/T 8170.

Applicability and future prospects of the standard

With the development of technology, the application field of chlorinated polyvinyl chloride resin will continue to expand. It is recommended that relevant companies pay close attention to industry trends during the production process and update testing equipment and process flow in a timely manner to meet higher quality requirements.