Buy AD MERKBLATT W2 ENGLISH: AUSTENITIC AND AUSTENITIC-FERRITIC STEELS from SAI Global. Document history, AD Merkblatt W 2 () AD Merkblatt W 2 ( ) AD Merkblatt W 2 () AD Merkblatt W 2 (). Austenitic and austenitic-ferritic steels. Materials for pressure vessels. AD Merkblatt. W2. The AD Merkblätter are prepared by the seven associations .

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If above-normal loadings are to be expected during the operation of the pressure vessel, this shall be taken into account by meeting special requirements.

If there are any divergences from the requirements of this AD Merkblatt, it shall be possible to prove w the standard of safety of this Code has been maintained by other means, e. Please address any proposals for this to the publisher: The AD Code is a along the lines of a selfcontained concept. If other technical rules are used according to the state of the art to solve related problems, it is assumed that the overall concept has been taken into account.

The AD Code can be used as appropriate for other modules of the Pressure Equipment Directive or for different sectors of the law. Responsibility for testing is as specified in the provisions of the relevant sector of the law. For materials not included in Table 7, see Note 2 of 8. The rights of use, particularly of any translation, zd, extract of figures, transmission by photomechanical means and storage in data retrieval systems, merkblaht of extracts, are reserved to the author. Beuth Verlag has taken all reasonable measures to ensure the accuracy of this translation but regrets that no responsibility can be accepted for any error, omission or inaccuracy.

In cases of doubt or dispute, the latest edition of xd German text only is valid.

AD 2000-Merkblatt W 2:2016-09

Bars and forgings made of austenitic or austenitc-ferritic steels as specified in DIN EN and DIN EN may be used with the applicable cross-sectional area given in these standards up to a maximum of mm emrkblatt bars and mm for forgings. In this case, consideration shall be given, as appropriate, to long-term elevated temperature values if no intergranular corrosion can occur and their suitability1 for the specified application temperature has been verified.

This also applies to the filler metal of welded tubes. For welded tubes3the procedures and personnel for manufacture and testing by the relevant third party shall be confirmed.


An approval procedure e. V-Merkblatt Part 2 aligned with the manufacturing method shall exist that also contains the type and scope of the non-destructive testing. The need for and the type of heat treatment shall also be specified. If the verification of suitability has led to a VdT? V-Werkstoffblatt, mwrkblatt the Index of VdT?

Welded tubes are those manufactured by qualified, mechanized welding procedures in continuous production from strip or in series production as a single length from lengths of strip. If not specified in the order, the manufacturer specifies the welding procedure. Tubes or nozzles manufactured individually do not come within this definition.

Steels conforming to SEW are tested according to the above standards depending on the product form. Steels complying with other material specifications are governed by the stipulations of the suitability verification1. As long as uniformity and meeting the set requirements over the length of the strip have been proven to the relevant third party with an adequate degree of reliability, the test for strip is carried out on one test section per coil.

A reference shall be made in the inspection certificate to the verification of the uniformity over the strip length and the approval by the relevant third party. If agreed with the user, this test may be dispensed with.

AD W2 08_图文_百度文库

If agreed with the user, this test may be dispensed with the test shall be 20000 out according to DIN ENoption In addition, the following tests shall be carried out: If imperfections merklbatt found in the tubes tested in this way, all the tubes shall be tested in a non-destructive manner over their whole length.

Testing of tubes made of steels covered by SEW is carried out in the same way. For tubes within a pressure vessel internal tubes 4the ultrasonic examination may be dispensed with. This is generally the case also if the pressure in the tubes is greater than that in the pressure vessel. The order shall specify whether internal tubes are involved. For forgings disk, perforated disk, ring, bushthe relevant dimension according to Table B. For the number of sets of specimens, at least the number given in Table 4 is applicable.

The random sample number for the non-destructive test for surface imperfections and for the dimensional test is Bolts of sizes M 52 and above shall also have the cast number. If an inspection certificate 3. For plate, sheet and strip made of the steels specified in 2. Seamless tubes made of steels of material numbers 1. Welded tubes made of the steels aad in 2. If, after conclusion of the approval of the welding procedure according to VdT? The decisive factor here is the number of tubes per size, or per size group tested by the relevant third party.


This applies only to the austenitic standard grades listed in Table 1a. The transition to an inspection certificate 3. If use is made of this provision, the letter of confirmation shall be quoted in the inspection certificate 3. For seamless and welded tubes made of the steels specified in 2. The test scope and acceptable limits shall be fixed. For cold re-drawn bars as specified in 2. The inspection certificate 3.

Substituting the test certificates with a stamp and compliance with the conditions shall be the subject of an agreement see VdT? For bolts and nuts as specified in 2. The design and the dimensional accuracy of machined bolts according to 2. It is assumed that the manufacturer has been certified according to AD Merkblatt W 0.

For steels covered by other material specifications, the strength characteristic values for the design shall be specified in the suitability verification1.

In the other temperature ranges, linear interpolation between the values given is required e. The interpolated strength characteristic values shall be rounded down to the nearest whole number. The minimum value to be adhered to shall be agreed with the material manufacturer. In conjunction with the certificate of production quality according to AD Merkblatt W 0. In conjunction with VdT?

In conjunction with the certificate of production quality according to AD Merkblatt W 0 otherwise 3. Mechanical properties of bolts and nuts made of steels as specified in 2. The elongation after fracture is determined in compliance with the test procedure in 6. For materials X5CrNi 1. When used merknlatt the temperatures indicated and with a working period of h, no intergranular corrosion occurs when tested according to this AD Merkblatt.

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