Metal Pressfitting Pipe Systems
Requirements and test methods
Part 3: Additional provisions for Pipe Systems
made of galvanized steel
Publishing house: VdS Schadenverhütung GmbH
Amsterdamer Str. 172-174
50735 Köln, Germany
Phone: +49 221 77 66 0; Fax: +49 221 77 66 341
3
VdS Guidelines for water extinguishing systems
Metal Pressfitting Pipe Systems
Requirements and test methods
Part 3: Additional provisions for Pipe Systems made of
galvanized steel
Content
0
Noncommittal statement ... 4
1
Scope ... 4
2
Normative References ... 4
3
Amendments to VdS 2100-26-1 ... 4
3.1
Allowable pressures, sizes and application conditions ... 4
3.2
Material, design, nominal sizes, dimensions ... 4
3.3
Installation instructions ... 5
4
Additional provisions for the approval procedure ... 5
4.1
Manufacturing quality of galvanized pipes ... 5
4.2
Inspection of installed pipework made of galvanized pipes ... 5
Annex A – Allowable pressure, nominal sizes and application conditions ... 6
Annex B – Order specification, manufacturer’s specification (system pipes) ... 7
Annex C – Order specification, manufacturer’s specification (tubes for fitting
production) ... 8
Annex D – Nominal sizes, dimensions and tolerances ... 9
Annex E – Adapter fittings for connection of non-system components ... 10
0 Noncommittal
statement
The present VdS Guidelines for water extinguishing systems, Metal Pressfitting Pipe
Systems, VdS 2100-26-3en, are only binding if their use is agreed in each individual
case.
1 Scope
This part of VdS 2100-26 contains the material specific amendments to VdS 2100-26-1
for pipe systems made of galvanized steel.
2 Normative
References
These Guidelines incorporate, by dated or undated references, provisions from other
publications. These normative references are cited at the appropriate places in the text,
and the publications are listed hereafter. For dated references, subsequent amendments
to or revisions of any of these publications apply to these Guidelines only when
incorpo-rated in them by amendment or revision. For undated references the latest edition of the
publication referred to applies.
VdS CEA 4001
Guidelines for sprinkler systems – Planning and installation
DIN EN 10204
Metallic products – Types of inspection documents
DIN EN 10305-3
Steel tubes for precision applications – Technical delivery
condi-tions – Part 3: Welded cold sized tubes
DIN EN 10346
Continuously hot-dip coated steel flat products – Technical delivery
conditions
DIN EN ISO 8493
Metallic materials – Tube – Drift-expanding test
ISO 7-1
Pipe threads where pressure-tight joints are made on the threads –
Part 1: Dimensions, tolerances and designation
DIN EN 1092
Flanges and their joints – Circular flanges for pipes, valves, fittings
and accessories, PN designated
3
Amendments to VdS 2100-26-1
3.1
Allowable pressures, sizes and application conditions
Annex A applies for allowable pressures, sizes and application conditions.
3.2
Material, design, nominal sizes, dimensions
3.2.1 Pipes and fittings shall be made from galvanized steel.
3.2.2 For system pipes, the requirements of Annex B and Annex D apply.
3.2.3 For tubes for fitting production, the requirements of Annex C and Annex D apply.
3.2.4 For adapter fittings for connection of non-system components, the requirements of
Annex E apply.
5
3.3 Installation
instructions
The installation instructions shall contain additionally
description of measures and regulations regarding corrosion protection.
4
Additional provisions for the approval
procedure
4.1
Manufacturing quality of galvanized pipes
For system pipes and tubes for the fitting production for pipe systems made of galvanized
steel, Annex J applies.
4.2
Inspection of installed pipework made of galvanized pipes
The approval is generally valid for a period of four years. Prior to an extension of the
ap-proval for a pipe system with galvanized steel pipe, a VdS-inspection for signs of
corro-sion is necessary of at least three installed pipeworks.
Note: The purpose of the inspections is to gain experience, on one hand with the material
in general and on the other hand with the various approved products. Specific
require-ments and assessment criteria are not yet defined. These will be developed with
increas-ing experience.
Annex A – Allowable pressure, nominal sizes and
application conditions
Table A.1
Pressfitting pipe systems made of galvanized steel, Allowable pressure, nominal sizes and application conditions Allowable pressure 10 bar to 16 bar
Nominal sizes DN 20 to DN 100
Application area (Hazard class)
according to VdS CEA 4001:
Hazard classes LH, OH1, OH2 and OH3 and exhibition halls, cinemas, theatres, concert halls
Application area (Pipework)
Wet sprinkler systems:
horizontal branch pipes and horizontal distribution pipes down-stream the alarm valve station (not vertical main and submain distribution pipes)
Spacing of the fixings According the provisions of VdS CEA 4001 for copper pipes
Additives to the extinguishing water
Not permitted; exception: additives after release of manufacturer and previous agreement with VdS.
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Annex B – Order specification, manufacturer’s
specification (system pipes)
Table B.1
Pressfitting pipe systems made of galvanized steel, Minimum order requirements for system pipes (continuous galvanized steel; Sendzimir process)
- Delivery condition of pipes - welded and rolled to size,
„+CR1“ resp. „+CR2“ oder „+N“ nach DIN EN 10305-3 - Material - E275, 1.0225, or - E260, 1.0220, or - E235, 1.0308, or - E220, 1.0215, or - E215, 1.0212, or - E195, 1.0034, or - E190, 1.0031
- Dimensions and tolerances see Annex D - DIN EN 10305 Part 3, Table 6
The specified wall thicknesses (T) – however not the tolerances – may exceed the values given in Annex D.
- Surface design
- galvanised at inside and outside: surface in accordance with DIN EN 10346 - design small zinc spangle M, and
- improved surface B, and
- ]LQFWKLFNQHVVDWOHDVW= «ȝP=Q - Surface finish
- 5D μm - End design
- on both sides sawn perpendicular to the pipe axis and deburred - Welding process and seam treatment
- High frequency pressure welding process with and without afterglow
- Outside seam largely even, on the inside welding seam elevation 0,8 mm max. - Corrosion protection of welding seam (outside)
- 10 μm Zn or Zn/Al - Yield strength
- Specification of yield strength Re (ReH or yield stress Rp0,2 of basic steel material of system pipes)
- Marking
- according to individual manufacturer’s specifications,
at least in accordance with the requirements of these guidelines - Evidence in accordance with Annex F
- Confirmation of fulfilled order specifications by 3.1 inspection certificate in accordance with DIN EN 10204
Annex C – Order specification, manufacturer’s
specification (tubes for fitting production)
Table C.1
Pressfitting pipe systems made of galvanized steel, Minimum order requirements for tubes for fitting production
(Carbon steel; the fittings – inside and outside – are galvanized subsequently)
- Delivery condition of pipes
- „+N“ acc. DIN EN 10305-2 and/or DIN EN 10305-3 - Material - E275, 1.0225, or - E260, 1.0220, or - E235, 1.0308, or - E220, 1.0215, or - E215, 1.0212, or - E195, 1.0034, or - E190, 1.0031
- Dimensions and tolerances see Annex D - DIN EN 10305 Part 3, Table 6
The specified wall thicknesses (T) – however not the tolerances – may exceed the values given in Annex D.
- Surface design
- blank; galvanizing – inside and outside – after forming, coating thickness inside 2 μm, coating thickness outside 8 μm
- Surface finish - 5D μm
- Welding process and seam treatment
- High frequency pressure welding process with and without afterglow - Outside: seam largely even, smooth;
- Inside: to be smoothed or scoured and free from scratches; - Marking
- according to individual manufacturer’s specifications, at least in accordance with the requirements of these guidelines
- Confirmation of fulfilled order specifications by 3.1 inspection certificate in accordance with DIN EN 10204
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Annex D – Nominal sizes, dimensions
and tolerances
Table D.1
Pressfitting pipe systems made of galvanized steel, Permitted nominal sizes, dimensions and tolerancesen
for system pipes and tubes for fitting production
Steel pipe dimensions and tolerances acc. DIN EN 10305-3, clause 8.5.1.3 table 6 Nominal sizes
External diameter* Minimum wall thickness DN Inch [mm] [mm] [mm] 20 ¾“ 22 22 ± 0.15 1.5 ± 0.15 25 1“ 28 28 ± 0.15 1.5 ± 0.15 32 1 1/4“ 35 35 ± 0.20 1.5 ± 0.15 40 1 ½“ 42 42 ± 0.20 1.5 ± 0.15 50 2“ 54 54 ± 0.30 1.5 ± 0.15 65 2 ½“ 76.1 76.1 ± 0.35 2.0 ± 0.20 80 3“ 88.9 88.9 ± 0.40 2.0 ± 0.20 100 4“ 108 108 ± 0.60 2.0 ± 0.20
* Within the permitted range of nominal sizes, additional intermediate external diameters are possible.
Note: There shall be sufficient dimensional difference between the sizes of the pipe system, so that a press connection of two different sizes is not possible without being identified as faulty connection purely visually and/or by use of the tools specified in the installation instructions and the specified test method.
Annex E – Adapter fittings for connection of
non-system components
The press part of the adapter fitting shall be designed in accordance with the provisions
for pressfittings and thus be made from tubes according to Annex C and Annex D.
For material and permitted connections of the adapter fitting part that is designed for the
connection of non-system components, table E.1 applies.
Table E.1
Pressfitting pipe systems made of galvanized steel,
Permitted connections and material for connections to non-system components Permitted connection Permitted material
standardized thread connection, preferably acc. ISO 7-1
Machining steel, galvanized according to Annex C standardized flange connection, preferably acc. DIN EN 1092
pipe coupling connection (grooved) acc. table E.2, cutting machined
Table E.2
Pressfitting pipe systems made of galvanized steel,
Dimensions for cutting machined pipe coupling connections (grooved)
Nominal
size Nominal outer diameter in mm
Outer diameter in mm Pipe length up to
groove in mm breadth Groove in mm
Diameter at ground of the groove in mm max. min. r 0,76 r 0,76 max. min. DN 25 33.7 33.73 33.07 15.87 7.92 30.23 29.85 DN 32 42.4 42.57 41.76 15.87 7.92 38.99 38.61 DN 40 48.3 48.74 47.78 15.87 7.92 45.09 44.70 DN 50 60.3 60.94 59.72 15.87 7.92 57.15 56.77 DN 65 76.1 76.85 75.35 15.87 7.92 72.26 71.80 DN 80 88.9 89.79 88.11 15.87 7.92 84.94 84.48 DN 100 114.3 115.44 113.51 15.87 9.52 110.08 109.58 Note 1: Groove shoulder free of burs with metal removed up to max. 0.3 mm x 45 °C.
