BS EN 1559-1:2011 pdf download
BS EN 1559-1:2011 pdf download.Founding — Technical conditions of delivery Part 1: General.
The purchaser may require the manufacturer to fully inspect the equipment supplied or to satisfy himself that the sufficient machining allowances for his manufacturing work and any subsequent machining are available.
4.3.3 • For general tolerances and machining allowances for castings, EN ISO 8062-3 shall apply unless otherwise specified by the purchaser.
The casting tolerance grade and, where applicable, the required machining allowance grade shall be specified on the drawing or iii the order.
4.4 •. Information on the mass
If there Is a tolerance on the mass for castings, agreement shall be made by the time of ordering as to whether the mass ol a casting shall be the same as the mass calculated from the drawing or the mass of an initial sample with sizes within the size tolerances. When the mass is calculated from the drawing, then any modifications to the mould andlor the casti’ig process and all machining allowances shall be taken into account.
4.5 .. Preliminary sample
The supply of preliminary samples may be agreed.
It preliminary samples are to be used only for checking dimensions but may deviate from the agreed material properties, this shall be agreed between the manufacturer and the purchaser
If the agreed tolerances are exceeded on Ihe preliminary sample, and if the purchaser gives his approval for such deviations, the new limit values shall be agreed
The terms of approval shall be previously agreed and described in a contractual document.
4.6 .. Initial sample
The supply of initial samples may be agreed.
If the agreed limit values or tolerances are exceeded on the Initial sample, and If the purchaser gives his approval for such deviations, the new limit values or tolerances shall be agreed.
The terms of approval shall be previously agreed and described in a contractual document,
5 DesignatIons
Designations of cast materials shall be in accordance with the following European Standards where applicable:
a) Cast steel: EN 10027-1 and EN 10027-2;
b) Cast Iron: EN 1560;
C) Cast magnesium: EN 1754;
d) Cast aluminium: EN 1780-1 and EN 1780-2;
e) Cast zinc: EN 12844.
6 Manufacture
6.1 .. Manufacturing process
The manufacturing process shall be left to the discretion of the manufacturer unless Otherwise agreed by the time of ordering or otherwise specified en the product standard.
NOTE The manufadurw’ig process covers all operations up to the delivery of the casting(s).
If requested m the order, the melting and moulding processes shall be indicated to the purchaser for
information.
6.2 Welding operations
6.2.1 General
The terms and definitions contained in the relevant European Standards for welding shall apply,
6.2.2 .. Production welding
6.2.2.1 Production welding includes finishing welding and joint welding
When joint welding is required, the purchaser shall give clear information m the Inquiry and order.
6.2.2.2 .. According to the weldability of the material, the geometry of the weld and the shape and the purpose of the casting three options are available for finishing welding
Unless the option of choice Is laid down in any relevant product standard andlor delivery standards, then the parties shall agree on one or more of the options below:
a) manufacturer may undertake finishing welding without reference back to the purchaser;
b) manufacturer shall inform the purchaser that finishing welding has been undertaken;
c) manufacturer shall obtain the purchase?s agreement prior to undertake finishing welding.
The order may require an approved procedure and/o a technical weldmg sheet and/or suitably qualified welders
6.2.2.3 .. With due regard to the material and the shape of the casting, production welds shall be made in such a manner that the values obtained for the relevant properties of the weld metal and the heat•aflected zone, are sufficient to correspond to the requirements of the parent matenal.
Agreements may be made regarding the filler metals used. Otherwise, the manufacturer shall decide this, where applicable, in accordance with the recommendations of the standard covering the material, or his experiences.
The areas where production welds are to be made shall be prepared and Inspected so as to ensure a satisfactory weld. No plugs or similar devices shall be used when carrying out the welding work unless agreements to the contrary have been made with the purchaser. If filler pieces are inserted m the case of large weld areas, these shal be similar to parent material.
6.2.2.4 .. If a casting is locally or completely subject to exceptional stresses and if these require special measures or compliance with special specifications during manufacture or testing of the casting, agreements may be made with the manufacturer by the time of ordering with regard to production welds and their inspection.
