To ensure the material component follows the ASTM standard, D&D use spectrometer to check the stainless steel raw material before production.
We also do the hardness testing for the product if necessary. 2. D&D use measuring tools to check the product in each procedure throughout the mass-production to ensure the dimension of product meet customer’s requirement. 3. D&D arrange Quality control department in each step of the mass-production to ensure each production fulfill their duty to produce well-product.
4. D&D use salt spray testing machine to test the product, to ensure it meet specific corrosion-resistance requirement.
5. D&D test products on testing machine very often to ensure products meeting CE / UL / ANSI standard.
We use International standard test machines to test in house with BS EN/ANSI standard.
Panic Exit Hardware Durability Test Machine
CE Standard Panic Exit Hardware, Tested to EN 1125 standard, for over 200,000 cycles Tested to ANSI/BHMA A156.3 Grade 1, for over 500,000 cycles Track of quality of mass production
Cylinder Lock Durability Test Machine·
Tested to EN 1303 standard Test for over 100,000 life cycles Track of quality of mass production
Mortise Lock Durability Test Machine
Tested to EN12209 Grade 3 standard Latch bolt for over 200,000 test cycles Dead bolt for over 50,000 test cycles Track of quality of mass production
Door Handle Strength and cycle Test Machine
Lever handle test for over 300,000 cycles Test to BS EN 1906 Grade 4 Standard Track of quality of mass production
Door Hinge Durability Test Machine
CE Standard Hinge, Tested to EN 1935 standard, for over 200,000 cycles ANSI Heavy Duty Hinge, Tested to ANS/BHMA A 156.1 Grade 1, for over 2,500,000 cycles
ANSI Standard Duty Hinge, Tested to ANS/BHMA A 156.1 Grade 2, for over 1,500,000 cycles Track of quality of mass production
Door Closer Durability Test Machine
CE Standard Door Closer, Tested to EN 1154 standard, for over 500,000 cycles Tested to ANSI/BHMA 156.4 Grade 1, for over 2,000,000 cycles Track of quality of mass production
6. D&D use 2D and 3D drawing to communicate with customer, which is clearly and accurately.
Base on above six quality control steps, D&D proudly says that “D&D commitment to quality”
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