kiasma fall pipe vessels

8/17/2019 Kiasma Fall Pipe Vessels

http://slidepdf.com/reader/full/kiasma-fall-pipe-vessels 1/8

FALL PIPE

KIASMAGroup

Solution A: flexible HDPE pipes

Solution B: flexible HDPE pipes with GRP



KIASMA SRL via M. Adamello 31/H 31059 Zero Branco (TV) ITALY tel. 0039 0422 97620 fax 0039 0422 48744

www.kiasmasrl.it [email protected]

FLEXIBLE FALL PIPE VESSELS

K I A S M A





Enclosed we are sending you two technical proposals for HDPE pipes for the “ Flexible

Fall Pipe Wessels” application.

We furthermore invite you to personally visit our production unit in Italy where we have 9

lines daily manufacturing HDPE pipes.

Solution A : Offer of HDPE pipe with steel cone

The particular nature of the material that will be discharged inside the pipes ( rock

dumping, ex rock Eclogite ) forced us to be very uncompromising with the type of polymer that we would have to use for the production of these pipes.

Our offer proposes pipe made of virgin HDPE PE 100, EN12201 – ASTM4710 PLUS –

Type BL, very resistant to crack test which also prevents the propagation of the fractures.

K I A S M A



Solution B: Offer of HDPE pipe with GRP and steel cone

The pipeline in HDPE – Type BL ( crack resistant ) is externally coated with a layer of

GPR ( Glass Reinforced Plastic ) processed by Filament winding.

- INNER LAYER IN HDPE PE100 Type BL = resistant to cracks propagation and

abrasion

- OUTER LAYER IN GRP = Filament winding

The fall pipe is constantly full of water. This fact help to counteract the negative

hydrostatic pressure acting externally on the circumference of the pipe.

It’s therefore suggested to always execute the Buckling Test Verification and obtain a

safety coefficient > 1 ( see enclosed file ).

With the characteristic of the HDPE pipe you required we obtain a safety coefficient of 0,3.

To obtain a coefficient >1 we have to coat the HDPE pipes with an external layer of GRP

also obtaining a reduced bending of the pipe.

OUTER LAYER IN GRP= Resistant to high pressures , resistant to shocks and

compensate for the intrinsic flexibility of the polyethylene pipeline.

The GRP outer layer Filament Winding, not subject to the attack of salt water, provides

high pressures and shocks resistance to conduct.

GRP thickness which is wrapped the HDPE pipe is designed according to the needs of

the yard work and responding to regulations ISO,EN,ASTM,ANSI, AWWA.

The possibility to vary the angle of wrapping of the glass (main component that ensures

the mechanical resistance of the product) allows pipes which have a modulus of axial

elasticity or circumferential the most appropriate to the application request



K I A S M A





Average values for the principal physical-mechanical properties of laminated in Filament

Winding:

breaking load traction circumferential : 2000 ÷ 4000 Kg/cm2

breaking load axial tensile : 400 ÷ 1200 Kg/cm2

elastic modulus traction circumferential : 100000 ÷ 300000 Kg/cm2

elastic modulus axial tensile: 50000 ÷ 125000 Kg/cm2

breaking load cut : 600 Kg/cm2

breaking load of compression : 2200 Kg/cm2

specific weight: 1,9

coefficient of linear expansion: 20,10 m/m °C

resilience : 220 Kg/ cm/cm2

electrical resistivity: 10 ohm cm

thermal conductivity: 0,2 Kca l/ (m2 h °C)

Pipeline “HDPE +GRP SYSTEM”

K I A S M A



JUNCTION SYSTEM

The junction is carried out by flanging.

The flat base of the stub flange is the location for the seal, o-ring

The joint between tube and tube, occurs between in polyethylene surfaces in order to

maintain the continuity of the line.

The layer of GRP cover the pipe and the welding between the pipe and stub end, and gets

to the flange.



K I A S M A





JOINT SYSTEM BETWEEN THE PIPES

To help the joint of the pipes they have a cone on top of them

For the joint of the pipes in HDPE + GRP system the joint is the same.

A flanged cone from one side joins the flange of the pipe and the other side is conical with

an angle dimension able to fit the upper pipe and allow the inclination of it of 15 – 20°

avoiding the upper pipe to get out of its position.

K I A S M A



K I A S M A



Annexed:

kiasma fall pipe vessels

Documents