BS EN 993-11:2007 pdf free

03-31 comment

BS EN 993-11:2007 pdf free.Methods of test for dense shaped refractory products – Part11:Determination of resistance to thermal shock.
Introduction
Thermal shock of refractory materials used in furnaces is influenced by three main factors:
– brick dimensions;
– heating/cooling conditions;
– material properties.
Thermal shock tests are usually intended to test material properties. This is done by standardizing brick dimensions and heating conditions through which a relative order of the quality of different types of bricks can be established. However, in case of thermal shock, this can lead to complications in the field of engineering.
The major complication is that, depending on the type of heating conditions, various material properties are involved. This can be best illustrated on the basis of thermal stress parameters, which are a measure for critical crack initiation.
BS EN 993-11 describes two alternative methods for determining the resistance to thermal shock of dense shaped refractory materials by an air quenching method, which proved to give the most reliable results when compared with the behaviour of refractories in furnace linings.
Method B can also be applied to unshaped refractory materials.
2 Normative references
EN 993-6, Methods of test for dense shaped refractory products – Part 6: Determination of modulus of rupture at ambient temperature
4 Principle
4.1 Method A
The test piece is homogeneously heated to 950 °C in an electric furnace then removed, placed on a steel plate and exposed to blowing air. After quenching, the test piece is subjected to a stress of 0,3 MPa in a bending machine. This cycle is repeated until failure of the test piece occurs.
The resistance to thermal shock is defined by the number of cycles withstood by the test piece before breaking.
4.2 Method B
The test piece is homogeneously heated to 950 °C in an electric furnace then removed, placed on a steel plate and exposed to blowing air. After quenching this is repeated 4 times. After cooling down, the residual cold MOR and the residual sonic velocity are determined.
The resistance to thermal shock is defined by the percentage residual MOR and residual sonic velocity related to the MOR and sonic velocity of non-quenched test pieces.BS EN 993-11 pdf download.

Download It Now Download Here
ATTENTION: I REALLY NEED YOUR SUPPORT.THANKS A LOT.
BS ISO 24081:2021 pdf download BS pdf free download

BS ISO 24081:2021 pdf download

BS ISO 24081:2021 pdf download.Ground cassava leaves (Isombe) — Specification. 1 Scope This document specifies requirements and methods of sampling and testing for ground cassava leaves, which are obtained from the processing of fresh cassava leaves (Manihot esculenta Crantz or Manihot glaziovii) intended for human consumption. 2 Normative references The following documents are referred to in the text in such...
Download

BS EN 1463‑2:2021

BS EN 1463‑2:2021 pdf download.Road marking materials — Retroreflecting road studs Part 2: Road test performance specifications. 4 Test sites and conditions 4.1 General Test sites shall be arranged at suitable locations that meet at least the requirements of 4.2 to 4.5. The test results will depend on the weather, traffic and road surface conditions. These shall all be described...
Download
BS ISO 3739‑2:2021 pdf download BS pdf free download

BS ISO 3739‑2:2021 pdf download

BS ISO 3739‑2:2021 pdf download.Industrial tyres and rims Part 2: Pneumatic tyres (metric series) on 5 degrees tapered or flat base rims — Load ratings. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited...
Download

LEAVE A REPLY

Anonymous netizen Fill in information