Nominal wall thickness mm 2.0 2.5 2.8 3.2 3.5 3.8 4.0 4.5
Coefficient c 1.064 1.051 1.045 1.040 1.036 1.034 1.032 1.028
Steel grade: Q215A; Q215B; Q235A; Q235B
Test pressure value / Mpa: D10.2-168.3mm is 3Mpa; D177.8-323.9mm is 5Mpa.
KN95 Protecive face masks adopt the GB2626-2006 standard, which stipulated the production and technical specifications of respirators .there is strict requirements on materials, structure, appearance, performance, filtration efficiency , breath resistance, test methods, product identification and packaging.
Protective Face Mask,Anti-particulate Protective Mask,Face Mask KN95,Non Medical Face Mask
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