(203) 855-7535

North American Representative for Buch and Eisenbau Kramer

Eisenbau-Krämer

Large Diameter Steel Pipes/Shells

EBK longitudinally welded (saw) pipes/shells used as components in paper machines and other machinery.

Running machines efficiently is based on components that guarantee high performance. EBK pipes/shells have state-of-the-art tolerance levels, which help you in achieving this goal.

EBK Pipes/Shells are used in

Paper machines as:

  • Felt rolls
  • Wire rolls
  • Press rolls
  • Dryers
  • Reel spools
  • Winder drums

Other machinery/general engineering as:

  • Hydraulic cylinders
  • Cable drums
  • Yarn rollers
  • Rolls for weaving machinery
  • Dryer rolls

Pressure vessels as:

  • Cans
Large Diameter Steel Pipes

Steel Press

Bending to the latest technical standard

Our 6,200 ton press at work

  • Max. pipe/shell length: 13400mm (527.5")
  • Wall Thickness: up to 77mm (3.03")
  • Min. pipe/shell diameter: 406.4mm (16")
  • Max. pipe/shell diameter: 1.524mm (60")

6,200 Ton Press


Production steps of our 6,200 ton press

Heat Treatment

  • Stress relieving
  • Annealing
  • Normalizing
Heat Treatment

Three Roll Bending Machine

Before Bending Bening In Progress Bening Finished
  • Wall thickness: up to 250mm (8.66")
  • Min. I.D.: 1,000 mm (39.37")
  • Max. O.D.: 4,000 mm (157.48")

Size Range

  • Diameter:
     500mm - 4,000mm
    (19.68" - 157.48")
  • Wall thickness:
     20mm - 250mm
    (.787" - 8.66")
  • Length:
     2.000mm - 13,400mm
    (78.74" - 527.55")
  • Other dimensions per request.

O.D. machining/turning

  • O.D. dimensions:
     min. 500 mm
     max. 2,050 mm
     length max. 12,500
  • Tolerance:
    ISO 286 max IT 6
    according to shell diameter
  • Surface Finish:
    Standard
     Ra 3.2 µm - 12.5 µm
    Special
     Ra 0.8 µm - 1.6 µm

Machining

  • Pipes/shells with close tolerances, no additional machining
  • Pipes/shells machined; O.D. and I.D. either rough or finish turned
  • Other machining (i.e. counterbore, etc.) per customers' specifications

Machining

I.D. Machining

I.D. Machining

Dimensions:

  • O.D. Shells:
    min. 500 mm
    max. 2,050 mm
  • I.D. Boring Size
    min. 370 mm
    max. 1,800 mm
  • Boring Length:
    max. 14,000 mm

Tolerances

  • Standard
    Concentricity max. 0.5 mm
    Diameter of bore +/- 0.5 mm
  • Special
    Concentricity max. 0.3 mm
    Diameter of bore +/- 0.25 mm

Surface Finish

  • Standard Ra 12.5 µm RMS 500 µ"
  • Special Ra 1.6 µm RMS 70 µ"