Shanghai Leihua Slate Co.,LTD

We offer blue black roofing slates which have passed the test of BS EN 12326 Part 2: 2000 and classifies the slate as A1, and also have passed the test of ASTM C406 classified the slate as grade S1.

Quality is very important, each slates will be carefully inspected by our professional inspectors before packed into wooden crates. we guarantee that each slate is clear, correct processed, and it is right slates which customer is looking for.

Delivery in time is also important. we use wooden crate pack slates and then loaded into 20 ft container,we will send our customer pictures of slates which is loaded into container

We supply black roofing slate

Certificate of Testing & Analysis
Determination of Dimensional Properties
BS EN 12326: Part 2: 2000
BS EN 12326: Part 1: 2004
ASTM C406-Grade S1

Methods of Testing and Analysis
Method	BS EN 12326: Part 2: 2000. Slate and stone products for discontinuous roofing and cladding – Part 2: Methods of test.
Comments	Samples for test taken from a batch of 70 submitted by the client.
Accreditation	All equipment employed was traceable to National standards and within calibration.

Test Description	Result
Basic Individual Thickness, mm	3.4
Packed Thickness, mm	5.1
Deviation from Length / Width, %	0.0 / 0.2
Deviation from Edge Straightness, %	0.1 / 0.2
Deviation from Rectangularity, %	0.9
Deviation from Flatness, %	0.4
Defects	None observed
Mean MoR, MPa, Longitudinal	69
Mean Failure Load, N, Longitudinal	1050
Standard Deviation, Longitudinal	16.31
Characteristic MoR, MPa, Longitudinal	41
Mean MoR, MPa, Transverse	62
Mean Failure Load, N, Transverse	900
Standard Deviation, Transverse	16.71
Characteristic MoR, MPa, Transverse	33
Grain Direction	None apparent
Water Absorption, %	0.21
Thermal Cycle Results	No changes
Carbonate Carbon Content, %	0.3
Sulfur Dioxide Exposure Results	No changes
Non-Carbonate Carbon Content, %	0.4
Criteria	Performance
Individual Thickness of Slates shall not be less than 2.0mm	pass
Manufacturers Declared Nominal Thickness, mm	4-7
Minimum Individual Thickness, mm	3.4 (UK)
Individual Thickness within ±35% of Nominal Thickness	Pass
Packed Thickness within ±15% of Nominal Thicknes	pass
Slates not to Deviate by more than 5mm from Declared Length/Width	pass
Edge Straightness Deviation shall not exceed 5mm	pass
Edge Straightness Deviation shall not exceed 1% of the length	pass
Rectangularity shall not deviate by more than ±1% of the length	pass
Flatness shall not deviate by more than 1.5%	pass
Absorption Class	A1
Declared Characteristic Modulus of rupture, Mpa	33
Thermal Cycle Class	T1
Carbonate Carbon Content, %	< 5
Sulfur Dioxide Exposure Class	S1
Thickness Adjustment	None
Non-Carbonate Carbon Content < 2%	Pass
Release of Dangerous Substances	None in normal use
External Fire Performance	Deemed to satisfy
Reaction to Fire	Class A1
Result
Below the pass/fail criteria have been applied based on the results.
Minimum Individual Thickness of Slates shall not be less than 2.0mm	pass
Manufacturers Declared Nominal Thickness, mm	4-7
Individual Thickness within ±35% of Nominal Thickness	pass
Packed Thickness within ±15% of Nominal Thickness	pass
Slates not to Deviate by more than 5mm from Declared Length/Width	pass
Edge Straightness Deviation shall not exceed 5mm	pass
Edge Straightness Deviation shall not exceed 1% of the length	pass
Rectangularity shall not deviate by more than ±1% of their length	pass
Manufacturers declared slate finish type	normal
Flatness shall not deviate by more than 1.5 %	pass

Remarks
The slate samples tested passed all the dimensional requirements. Slate is a natural
product and is expected to vary in consistency and properties. Therefore it is
recommended that testing is carried out in accordance with the frequencies suggested
by Table 7 of BS EN 12326: Part 1: 2004.

If you need the full test report, please don't hesitate to contact us, we would like to send one copy of the certificate to you by email, the certifcate is PDF formate and it include 12 pages.