Pipes for Hydraulic Cylinders and Piston Accumulator Construction

Applications in the Hydraulic field are growing all over the world due to their ability to manage considerable power using components with little size and weight. In each application, when it is required to convert hydraulic energy into mechanical force or movement, Hydraulic Cylinders or Piston Accumulators are used.

Our principals are a reliable and highly qualified partner in the production of stainless steel and special alloys centrifugal cast pipes used as a barrel for the Cylinder or Accumulator construction.

Pipe/Barrel for Piston Accumulator

Pipe/Barrel for Piston Accumulator

Piston Accumulator

Piston Accumulator

 

Hydraulic CylinderHydraulic Cylinder

Pipe/Barrel for Hydraulic Cylinder

Hydraulic Cylinder

Hydraulic Cylinder

 

Supply condition of the pipe:

  • Rough condition: annealed or tempered, as requested
  • OD and ID premachined cylindrical
  • finish machined with internal honing

Our principals are equipped with an excellent machining department and with a whole series of further qualified machining subsuppliers, in order to perform all types of machining operations.

Horizontal LatheHorizontal LatheFinish Machined Pipe
CNC horizontal lathe for machining long and big pipesCNC horizontal lathe for machining long and big pipesFinish machined pipe

 

Dimensional Range

Outside Diameter200 < OD < 1200mm
Minimum honed Inner Diameter

ID (honed) > 65mm

Length of pipeL up to 4750mm

 

 

 

 

Rough PipePremachined PipesRough Pipe
Rough pipe with thickness of 100mmPipes premachined outside and honed insideRough pipes

 

 

Materials

The application fields of Hydraulic Cylinders and Piston Accumulator are very wide: Oil and Gas, Energy, Hydraulic, Static or Motion Mechanical Engineering.

Below you can see a table with typical materials and their properties in these applications.

 

TYPICAL GRADES SUITABLE FOR THIS APPLICATION
CATEGORYCROSS REFERENCESCHEMICAL ANALYSIS (ACC. TO ASTM)TENSILE PROPERTIES (ACC. TO ASTM)
StructureACI/CastCast ASTMCast EN/DINCast UNSWrought UNSWrought GradeCCrNiMoOtherRp0.2[MPa]Rm [MPa]A %Hardness [HB]
MartensiticCPCA15A4261.4008 GX8CrNi13J91150S41000AISI 410<0.15 11.5-14.0 - <0.5  450 620 18 <225
MartensiticCA6NMA352, A487, A7571.4313 GX5CrNi134J91540S4150013-4, F6NM<0.06 11.5-14.0 3.5-4.5 0.4-1.0  550 760-930 15 230-300
AusteniticCPF3A4511.4306 X2CrNi19-11J92500S30403AISI 304L<0.03 17.0-21.0 8.0-21.0 <0.5  205 485 35 140-200
AusteniticCPF8A4511.4308 GX6CrNi189J92600S30400AISI 304<0.08 18.0-21.0 8.0-11.0 <0.5  205 485 35 140-200
AusteniticCPF3MA4511.4404/1.4409 X2CrNiMo17-12-2J92800S31603AISI 316L<0.03 17.0-21.0 9.0-13.0 2.0-3.0  205 485 30 140-200
AusteniticCPF8MA4511.4408 GX6CrNiMo18-10J92900S31600AISI 316<0.08 18.0-21.0 9.0-12.0 2.0-3.0  205 485 30 140-200
Duplex/SuperduplexSAF 2304®-1.4362S32304-SAF 2304<0.03 21.5-24.5 3.0-5.5 0.05-0.6 0.05-0.2N 400 600-820 25 180-250
Duplex/SuperduplexCD3MNA890, A9951.4470 GX2CrNiMoN22-5J92205S31803SAF 2205, F51<0.03 21.0-23.5 4.5-6.5 2.5-3.5 0.1-0.3N 415 620 25 200-260
Duplex/SuperduplexCE3MNA890, A9951.4469 GX2CrNiMoN26-7J93404S32750SAF 2507®, F53<0.03 24.0-26.0 6.0-8.0 4.0-5.0 0.1-0.3N 515 690 18 200-280
Duplex/SuperduplexCD3MWCuNA890, A995-J93380S39276ZERON 100®, F55<0.03 24.0-26.0 6.5-8.5 3.0-4.0 0.5-1.0Cu, 0.5-1.0W, 0.2-0.3N 450 690 25 220-280

 

 

What is Centrifugal Casting?

The Centricast process consists of pouring molten metal into a steel rotating mould. Water cooling of the mould permits a fast solidification from the outside to the inside surfaces of the casting. After the solidification the item is pulled from the mould and is ready for heat treatment.

Here you can see some pictures about the production cycle of a  centricast pipe in A451 CPF8 (304).

 

Rotating Mould  Molten MetalRotating Mould        Oxides and Impurities
Centrifugal CastingCentrifugal Casting
Molten metal forced centrifugally against mould wall. Controlled solidification progresses inward towards the bore.Oxides and impurities concentrate in the bore and are removed by machining.

 

Centrifugal Casting ProcessCentrifugal Casting ProcessCentrifugal Casting Process
Production cycle of a centricast pipe

 

 

Why choose Centrifugal Casting?

The centricast process produces:

  • Mechanical separation of non-metallic inclusions: microstructure cleanliness (improvement in performance). They will be eliminated during machining operation.
  • High density of the material.
  • Very short lead time (Rough condition: 2 weeks / premachined 3-4 weeks ex works).
  • All alloys can be produced (acc.to all international standards).
  • Optimized mould to reduce weight and costs.
  • Mechanical properties higher than that of static castings and fully comparable with forgings.
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