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.

In accordance with relevant national laws, regulations, and standards, this service conducts quality testing related to production, installation, and protective performance for protective equipment listed in the "Catalogue of Civil Air Defense Protective Equipment Products." Technical methods employed include non-destructive testing of concrete strength, non-destructive inspection (NDT) of steel structure welds, and on-site local airtightness testing.
Steel Structure Single-Leaf/Flat Leaf Doors
Reinforced Concrete Structure Single-Leaf/Flat Leaf Doors
Blast Wave Valves (Explosion Relief Valves)
Width of Door Frame Opening
Height of Door Frame Opening
Diagonal Length of Door Frame Opening
Section Thickness of Profile/Shape Steel
Width of Door Leaf
Height of Door Leaf
Diagonal Length of Door Leaf
Thickness of Door Leaf
Concrete Strength of Reinforced Concrete Structure Single-Leaf/Flat Leaf Doors
Panel Thickness of Steel Structure Single-Leaf/Flat Leaf Doors
Quality of Splice Welds
Quality of Seam/Continuous Welds
Length of Swing/Louver Panel (for Blast Wave Valves)
Width of Swing/Louver Panel (for Blast Wave Valves)
Thickness of Swing/Louver Panel (for Blast Wave Valves)
Steel Structure Single-Leaf/Flat Leaf Doors (Blast / Blast-tight / Airtight Doors):
RFJ 04-2009, GB/T 11344-2021, GB/T 26952-2025, GB/T 26951-2025, GB/T 29712-2023, JG/T 203-2007, GB/T 11345-2023
Reinforced Concrete Structure Single-Leaf/Flat Leaf Doors (Blast / Blast-tight / Airtight Doors):
RFJ 04-2009, GB/T 11344-2021, JGJ/T 23-2011
Blast Wave Valves (Swing / Louver Type Explosion Relief Valves):
RFJ 01-2002, GB/T 11344-2021, GB/T 26952-2025, GB/T 26951-2025
Specializes in testing for civil air defense (CAD) engineering protective equipment and facilities. Testing capabilities include performance testing of various protective equipment such as blast-tight doors, airtight doors, valves, and overpressure exhaust valves, as well as on-site installation quality testing of various protective equipment and on-site testing of protective facilities. Equipped with advanced instruments and experienced personnel, backed by strong technical expertise.
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