Sanitary Welding_Norm

1-099-00-026-E

Company Standard

Page 1 of 27

Guidelines for Design and Manufacturing

Weld Seam Quality Assessment Groups: Imperfections – Tarnish –

Surface Roughness

(according to DIN EN ISO 5817)

1 General

1.1

1.2

1.3 Area of Application

This standard applies to all steel, nickel, titanium, and alloys fusion welds (not beam welding).

Applied Standards

- DIN EN ISO 5817 (2003-12): Welding - steel, nickel, titanium, and alloys fusion welds (no to

beam welding) – imperfections assessment groups

- AD 2000 Regelwerk: body of legislation concerning pressure vessels

- ASME-BPVCode sec. VIII: Rules for Construction of Pressure Vessels

- ASME-BPVCode sec. IX: Qualification Standard for Welding and Brazing Procedures, Welders,

Brazers and Welding and Brazing Operators

- ASME-Code for pressure piping B 31.3

- ASME-BPE 2002 Bioprocessing Equipment

- Technical Provision TP 60 (Anheuser Busch specification)

- ANSI/AWS D 18.1 Specification for Welding of Austenitic Stainless Steel Tube and Pipe

Systems in Sanitary (Hygienic) Applications

- Empfehlungen der EHEDG (European Hygienic Engineering and Design Group

recommendations)

First Issue

First issue: unknown

Issue Date : 05.07.2004

Effecting Period : Immediately

Official Implementation Date : 05.07.2004

NOTE:

This company standard describes and settles the basic principles of technical requirements

concerning the subject in question. It does not include manufacturer-specific solutions for

selection or adjustment. The concerned departments must have carried out the application of the

technical or mechanical provisions of the KRONES Company Standard and its integration into the

production process by the date of application of the Company Standard. The departments must

try to work out uniform application concepts for Company Standard requirements concerning

several divisions and thus support the standardisation process.

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Page 2 of 27

2 Application

This standard applies to all steel, nickel, titanium, and alloys fusion welds (not to beam welding).

The assessment groups concern the manufacturing quality of individual weld seams, not the

entire component.

Therefore, various assessment groups can be specified for the different welds of one component.

The assessment groups are specified in such a way that they permit a broad application in welding

production.

They are designated by characters B+, B, C, and D. Assessment group B represents the highest

demands placed on the weld.

Additional requirement B+ is applied for welds in contact with product or gas.

The assessment groups concern the manufacturing quality, not the usability of the product. (Please

refer to 3.2)

This standard applies to:

• unalloyed and alloyed steel

• nickel and alloys

• titanium and alloys

• manual, mechanised, and automatic welding

• all welding positions

• all weld types, e. g., butt welds, hollow welds, and pipe branches

• the following welding procedures and allocated individual procedures according to

ISO 4063:

11 Metal-arc welding without gas protection

12 Submerged arc welding

13 Gas-shielded metal-arc welding

14 Gas-shielded welding with non-consumable electrode

15 Plasma arc welding

31 Oxy-fuel gas welding (steel only)

Metallurgic aspects, e. g., grit size, hardness, are not considered.

Note on the use of assessment groups:

The assessment groups are selected according to

- design

- subsequent processes and surface treatment procedures

- types of strain (static, dynamic)

- operating conditions (e. g., temperature)

- cost

The highest demands placed on the weld quality (assessment group B or B+) normally require special

treatment and frequently cause additional expenses. This may be the case for

• dynamically strained welds

• weld surface with particular demands concerning process technology (e. g., with product

contact)

With components subject to acceptance, e. g., pressure vessels, please consider, among other

things, the project-oriented body of legislation.