China Testing & Certification International Group Co., Ltd. (CTC, Stock Code 603060) originated from the testing and certification business of China Building Materials Academy in the 1950s. After 70 years of unremitting efforts and persistent pursuit, the company has formed five business categories: detection and testing, certification and evaluation, testing instruments and intelligent manufacturing, measurement and calibration, scientific research and technical services, committed to providing customers with technical services and comprehensive solutions of detection and testing, certification and evaluation, appraisal, consultation, training, and instruments and equipment in fields of quality, environmental protection, green, safety, health, and energy conservation.

Glass Fiber Reinforced Plastic Jacking Pipes
Appearance
Diameter
Effective Length
Average Wall Thickness
Minimum Wall Thickness
Liner Layer Thickness
Straightness Deviation
Pipe End Face Perpendicularity
Barcol Hardness
Insoluble Resin Content
Glass Fiber Content of Straight Pipe Section Wall
Resin Content of Straight Pipe Section Wall
Filler Content of Straight Pipe Section Wall
Initial Ring Stiffness
Initial Hoop Tensile Strength
Initial Axial Tensile Strength
Axial Tensile Strain at Break
Hydrostatic Leakage
Initial Flexibility
Initial Axial Compressive Strength
Axial Compressive Modulus of Elasticity
Allowable Jacking Force
Long-Term Performance
GB/T 21492-2019
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