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ASSEMBLY AND DISASSEMBLY

Self restrained dismantling joint large stroke type steel PO
DN700-2000

Product family
Couplings and assembling

The self restrained dismantling joint Type PO for flanged valves allow the installation or removal of an equipment between two fixed flanges of a pipeline.

The sliding system can reach a 50 mm displacement to ease the removal of the equipment.

For this type of self restrained dismantling joint the locking of the valve to the pipeline is made by the tie bars and the gland.

Range

The self restrained dismantling joint Type PO exist in a range stretching from DN40 to 2000, for pressure PFA10, PFA16 and PFA25.

Technical design

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700 10 260 895 840 24 M27 450 25 25 256 MDB70DABH
700 16 300 910 840 24 M33 510 20 25 366 MDB70DAAH
700 25 340 960 875 24 M39 560 15 25 571 MDB70DADH
800 10 290 1015 950 24 M30 480 25 25 352 MDB80DABH
800 16 320 1025 950 24 M36 530 15 25 482 MDB80DAAH
800 25 360 1085 990 24 M45 620 25 25 800 MDB80DADH
900 10 290 1115 1050 28 M30 480 20 25 405 MDB90DABH
900 16 320 1125 1050 28 M36 540 15 25 546 MDB90DAAH
900 25 380 1185 1090 28 M45 635 15 25 920 MDB90DADH
1000 10 290 1230 1160 28 M33 485 15 25 450 MDC10DABH
1000 16 340 1255 1170 28 M39 570 15 25 715 160968
1000 25 400 1320 1210 28 M52 680 15 25 1280 MDC10DADH
1100 10 300 1340 1270 32 M33 520 25 25 585 MDC11DABH
1100 16 340 1355 1270 32 M39 595 25 25 810 160954
1100 25 450 1420 1310 32 M52 760 25 25 1389 MDC11DADH
1200 10 320 1455 1380 32 M36 545 25 25 744 MDC12DABH
1200 16 360 1485 1390 32 M45 630 25 25 1112 160939
1200 25 450 1530 1420 32 M52 760 25 25 1871 MDC12DADH
1400 10 360 1675 1590 36 M39 590 25 25 1036 MDC14DABH
1400 16 380 1685 1590 36 M45 660 25 25 1352 MDC14DAAH
1400 25 500 1755 1640 36 M56 830 25 25 2393 163600
1500 10 380 1785 1700 36 M39 615 25 25 1165 MDC15DABH
1500 16 400 1820 1710 36 M52 695 25 25 1580 MDC15DAAH
1500 25 500 1865 1750 36 M56 835 25 25 2445 MDC15DADH
1600 10 390 1915 1820 40 M45 645 25 25 1350 MDC16DABH
1600 16 420 1930 1820 40 M52 720 25 25 1400 MDC16DAAH
1600 25 510 1975 1860 40 M56 860 25 25 3132 MDC16DADH
1800 10 410 2115 2020 44 M45 675 25 25 1994 MDC18DABH
1800 16 420 2130 2020 44 M52 730 25 25 2400 MDC18DAAH
1800 25 550 2195 2070 44 M64 920 25 25 3850 MDC18DADH
2000 10 410 2325 2230 48 M45 675 25 25 2400 MDC20DABH
2000 16 450 2345 2230 48 M56 780 25 25 2800 MDC20DAAH
2000 25 600 2425 2300 48 M64 975 25 25 4560 MDC20DADH

Features

Material and coatings

Item Description Material Coating
1 Fixed body Steel EN 10025 S235JRG2 Blue epoxy powder 250 microns medium thickness with a minimum of 200 microns, in accordance with EN 14901-1 (PECB) - RAL 5005
2 Gland Steel EN 10025 S235JRG2
3 Sliding body Steel EN 10025 S235JRG2
4 Gasket EPDM rubber  
5 Tie bars Steel EN 10025 S235JRG2 or S335J2G3 grade 4/6 Zinc plating 15 µ
Joint_demontage_PO_nom

Installation

Joint_demontage_PO_installation

Compliance to Standards

For the self restrained dismantling Joint PO

These equipments comply with the standard NFE 29220, especially concerning the flanges dimensions according to ISO 7005.

The full-flange sliding body: the flange is according to ISO 7005 standard.

The stroke range is higher than those demanded in the NFE 29220.

Assembly and start up

Description

The self-restrained dismantling joint type "PO" allows the installation and removal of valves pieces or flanged pipes. An active adjustment length until ± 25 mm is possible during the assembly.

The transmission of the forces is carried out by the threaded rods on the counter flange.

Transport

The transport of the pieces must be done professionally in order to avoid damages on the material.

Storing

The self-restrained dismantling joint must be protected from bad weather and pollution. During a long storage period a protection against UV is necessary.

Assembling in the pipe network

It is necessary to control that the flanges to be connected are clean and not damaged. The flanges must be installed in parallel and centered.

Assembly

  • To fix the first flange with the flange of the pipe or the valve. The two flanges must be centered and parallel. The flat tightness seals (to be provided by the customer) will also be installed centered.
  • The nuts of the first connection are to be tightened (tightening torque according to information given by the supplier of the joint).
  • Assembly of the second connection taking into account the necessary mini and maximum length of the dismantling joint (A).
  • After the assembly of two connections, it is necessary to push the tightness seal (7) against the external pipe (2).
  • Then it is necessary to tighten the nuts with the ring of tightening (3). Once the assembly of the pipe finished and the length of the dismantling joint defined, it is necessary to tighten the nuts in cross.

The dismantling joint is now ready for operation and can receive the axial thrust of the pipe.

DN PN10 PN16
Threaded rod

Tightening torque to the tightening ring (±10%)

 Threaded rod

Tightening torque to the tightening ring (±10%)
mm   Nm   Nm
50 M16 42 M16 42
65 M16 42 M16 42
80 M16 42 M16 42
100 M16 42 M16 42
125 M16 42 M16 42
150 M20 82 M20 82
200 M20 82 M20 82
250 M20 82 M24 140
300 M20 82 M24 140
350 M20 82 M24 140
400 M24 140 M27 210
500 M24 140 M30 280
600 M27 210 M33 380
700 M27 210 M33 380
800 M30 280 M36 640
900 M30 280 M36 640
1000 M33 380 M39 780
1200 M36 640 M45 1200
1400 M39 780 M45 1200
1600 M45 1200 M52 1900
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