Technical Details of Vahterus Plate & Shell Heat Exchanger

Design

Vahterus Plate & Shell Heat Exchangers are designed and manufactured according to internationally recognised pressure vessel codes. The relevant code is shown on the Vahterus Technical data sheet. The most regularly used design codes are:

  • PED design (PED 2014/68/EU), is based on type approvals. The type approval number and PED category are shown on the Vahterus technical data sheet.
  • ASME VIII Div.1, based on an individual design for each heat exchanger.
Vahterus packaging

Dimensions

PSHE
model name
Heat transfer
area, m2
Nozzles
Plate, DN
Nozzles
Shell, DN
PSHE 20.5 – 52520 – 80
PSHE 31 – 505025 – 250
PSHE 43 – 1008025 – 300
PSHE 55 – 20010025 – 350
PSHE 66 – 35012525 – 500
PSHE 78 – 55015025 – 500
PSHE 915 – 100020025 – 700
PSHE 1430 – 200030025 – 1000

Plate materials

  • AISI 316L
  • AISI 904L
  • 254 SMO
  • Alloy C22, C276
  • Duplex
  • Titanium gr.1, gr.11
  • Nickel
  • Others on request

Shell materials

  • Carbon steel
  • AISI 316L
  • AISI 904L
  • 254 SMO
  • Alloy C22, C276
  • Duplex
  • Titanium
  • Others on reques

Flow directors / stoppers

  • EPDM
  • Silicones
  • PTFE
  • Fluoride silicone
  • Graphite

Mechanical design

  • Full vacuum to 150 bar
  • From -196°C to +600°C

Design code

  • AD-2000
  • ASME VIII, Div.1
  • EN 13445
  • Lloyd ́s Register
  • R.I.N.A.
  • ABS Europe Ltd
  • Bureau Veritas
  • PD5500
  • DNV GL Marine
  • KGS South Korea
  • EAC
  • Others on request

Quality system

  • ISO 9001:2008
  • ISO 3834-2:2005
  • ISO 14001:2004
  • PED module B+D
  • PED module H
  • SELO China
  • ASME U and R Stamp
  • OHSAS 18001:2007
Vahterus Plate pack

Connections

Plate Side Connections

The connections on the plate side are generally made from the same material as the heat transfer plates. These connections may be provided with:

  • stub ends as standard. On request they can be machined to match your piping system;
  • BSP thread up to size DN50;
  • weld on flanges EU / ANSI. Flange pressure class and material may be different from the connection nozzle material. Flanges with tongue or groove for gaskets are available on request;
  • collars with slip-on flanges. The material of the slip-on flanges can be different from the collar material;
  • design pressure of flanges can be lower than unit design pressure excluding flanges. This is valid for plate side only. I.e. PSshell = 40 bar, PSflanges = 16 bar;

Shell Side Connections

The connections on the shell side are generally made from the same material as the shell. They can be provided with:

  • stub ends as standard. On request they can be machined to match your piping system;
  • BSP thread up to size DN50;
  • weld on flanges EU / ANSI. Flange pressure class and material may be different from the connection nozzle material. Flanges with tongue or groove for gaskets are available on request;
  • collars with slip-on flanges. Material of the slip-on flanges can be different from the collar material.

Other possibilities are available on request.

Vahterus fully welded heat exchanger

Finishing of standard Vahterus units

Shell made of carbon steel:

  • inside and outside shot blasting, SA2,5;
  • pressure test with water and anti-corrosion inhibitor;
  • pressure test with nitrogen and 10% helium for plate pack;
  • outside painting according to data sheet and/or customer specification;
  • shot blasting only (no painting) on request, for skid assembling with own painting system.

Shell made of stainless-steel:

  • pressure test with water and anti corrosion inhibitor;
  • pressure test with nitrogen and 10% helium for plate pack;
  • glass pearl blasting (SS-parts) + steel grit blasting to SA2,5 (CS-parts) with no painting.

The following is also available for Vahterus Plate & Shell Units:

  • shot blasting with glass pearls;
  • leak test with helium / vacuum;
  • pickling and neutralisation of the plate pack and stainless steel shell;
  • filling with nitrogen with 1 bar overpressure.