Stainless Steel Metric DN/ND Tube & Fittings

A lightweight range of welded tube, fittings and flanges with thin walls.

A complete range of fittings including elbows, tees, reducers, end caps, collars, backing flanges and clamps is available.

Talk to an expert Stainless Steel Metric Tube and Fittings Range

What are Metric Tube and Fittings?

  • This is a lightweight range of welded tube, fittings and flanges with thin walls.
  • An I/D based system.
  • This range IS NOT to be confused with the ISO range of tube sizes which are sometimes INCORRECTLY called ‘ISO Metric’ – The ISO sizes are a thin walled, lower cost alternative to ANSI Pipe and are not very popular in the UK.
  • Note that an ‘Isometric’ is a pipe-work plan used by engineers and defined as follows: Isometric is a mathematical method of constructing a 3 dimensional object without using perspective. Isometric was an attempt to make drawing 3-D images easy and more realistic. The mathematics involved mean that all lengths when drawn at 30 degrees can be drawn using their true length (in other words lines aren't shortened as with oblique drawings). An isometric drawing shows two sides of the object and the top or bottom of the object. All vertical lines are drawn vertically, but all horizontal lines are drawn at 30 degrees to the horizontal.

Benefits & Applications

Benefits

  • Lightweight
  • Systems flexibility including ease of alteration
  • Fast welding times
  • Low consumable usage
  • Attractive appearance
  • Clean & hygienic
  • Low environment impact
  • Recyclability
  • Simple fabrication and erection
  • Good mechanical properties
  • Good ductility
  • Low maintenance
  • Long service life
  • Smooth surface with no coatings or linings

Applications

  • Water and waste water treatment
  • Pulp and paper industry
  • Food and drink (pre-process)
  • Pharmaceutical (bulk handling)
  • Chemicals
  • Construction
  • Semi conductor and other clean room facilities

Product Range Information

Products

  • Tube
  • Elbows, tees, reducers, end caps
  • Collars and flanges
  • Clips and clamps

Size Range

  • 15mm to 900mm DN
  • 18mm to 910mm O/D
  • Wall thickness 1.5mm to 5.0mm

Terminology

  • DN/ND = Nominal Diameter (I/D)
  • O/D = Outside/External Diameter
  • I/D = Internal Diameter

Backing Flanges

  • Stainless Steel
  • Aluminium – These may have an epoxy coating
  • Mild Steel – These will have a coating such as PPA571 Grey Epoxy, Zinc Plating

Manufacturing Specification?

  • Dimensional tolerances are to SS/EN/ISO 1127
  • Alloys are to BS EN 10088

Finishes

  • Sizes up to about 18mm DN may be bright annealed
  • Sizes up to about 70mm DN will be annealed and pickled
  • Larger sizes will be pickled but may be unannealed

Mild Steel Backing 'Plate' Flanges

  • Epoxy Coated 206N (Green)
  • Drilled according to BS4504 PN10/PN16

Information on Mild Steel Metric Tube Loose Backing Plate Flanges

Size Weight/Piece (Kg) Number of Bolt Holes

DN40 PN10/PN16
(Thickness 10mm)

1.20

4

DN50 PN10/PN16
(Thickness 10mm)

1.40

4

DN65 PN10/PN16
(Thickness 10mm)

1.70

4

DN80 PN10/PN16
(Thickness 10mm)

1.80

8

DN100 PN10/PN16
(Thickness 10mm)

1.90

8

DN125 PN10/PN16
(Thickness 12mm)

3.10

8

DN150 PN10/PN16
(Thickness 12mm)

3.80

8

DN200 PN16
(Thickness 12mm)

4.90

12

DN250 PN16
(Thickness 16mm)

8.00

12

DN300 PN16
(Thickness 19mm)

11.00

12

Certificate of Conformity

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