Manntek DCC User manual

DCC Operating Manual
manntek.se

Operating Manual
PR-050823-0121 Version 161109 2 of 14
F OREWORD
This operating manual applies to the persons using the Dry Cryogenic Couplings.
It is very important to read and understand this operation manual before use of this
coupling. Become familiar with the unit’s operation, applications and limitations. Be
particularly aware of its specific hazards. Store this manual in a clean area and always at a
readily available location. Additional copies at no charge can be obtained through written
requests.
IMPORTANT!!
READ THE COMPLETE DOCUMENTATION
The base for this manual follows the EC-Directive:
Pressure Equipment Directive
2014/68/EU of 15
th
of May 2014
•Do not make modifications that are not authorized by the manufacturer.
•Read and respect all warnings and instructions provided to you.
• Use only original MannTek spare parts for maintenance.
S UMMARY OF REVISIONS
Date of change
Description
201
3
-
1
1
-
2
9
First issue
2014
-
02
-
17
Modified service instructions
2015
-
12
-
22
Updated pressure rate DN150
2016
-
11
-
09
Gener
al review & New front page layout

Operating Manual
PR-050823-0121 Version 161109 3 of 14
T ABLE OF C ONTENTS
F OREWORD .....................................................................................................................................................2
S UMMARY OF REVISIONS ..................................................................................................................................2
T ABLE OF C ONTENTS .......................................................................................................................................3
1 I NTRODUCTION ........................................................................................................................................4
1.1 Intended use ................................................................................................................................. 4
1.2 Product specification..................................................................................................................... 5
1.3 Identification plate e.g. for DCC 3”-3”NPT................................................................................... 5
1.4 Scope of delivery .......................................................................................................................... 6
2 G ENERAL S AFETY R ULES ........................................................................................................................6
2.1 Safety Instructions ........................................................................................................................ 6
3 T RANSPORT AND S TORAGE ......................................................................................................................7
3.1 Delivery Check.............................................................................................................................. 7
3.2 Complaints / Return of goods ....................................................................................................... 7
3.3 Storage ......................................................................................................................................... 7
4 I NSTALLATION .........................................................................................................................................7
4.1 Initial Operation............................................................................................................................. 7
4.2 Installation..................................................................................................................................... 8
5 O PERATION .......................................................................................................................................... 10
5.1 General notes ............................................................................................................................. 10
5.2 Daily visual inspection ................................................................................................................ 10
5.3 Preparation for connection.......................................................................................................... 11
5.4 Making connection/disconnection............................................................................................... 12
5.5 Improper use............................................................................................................................... 12
6 M AINTENANCE AND R EPAIR ................................................................................................................... 13
6.1 General information .................................................................................................................... 13
6.2 Maintenance and service instruction .......................................................................................... 13
6.3 Dismantling ................................................................................................................................. 13
7 A PPLICABLE D OCUMENTS ..................................................................................................................... 14
7.1 Declaration of Conformity ........................................................................................................... 14

Operating Manual
PR-050823-0121 Version 161109 4 of 14
1 I NTRODUCTION
1.1 I NTENDED USE
Dry Cryogenic Couplings (DCCs) are designed for use wherever it is necessary to connect and disconnect
hoses and pipelines under moderate pressure, quickly and without spillage. They are designed primarily for
use with cryogenics where reliability and safety are of prime concern.
All MannTek products are designed for trouble free operation in a wide range of applications and operating
conditions. Reliable and safe operation is dependent upon the correct installation and handling of the
equipment. Regular and appropriate maintenance is essential to ensure both safety and reliability over the
life of the equipment. Take care that the product is only used inside the limits of the following product
specification.
Operation is single action (see chapter 5.4), using a straight forward turning motion to connect the couplings
and open a flow path. An initial push and turn action on the hose unit causes engagement with the tank unit,
thus locking and sealing the two units together. Further rotation causes the internal valves to open, thereby
allowing flow with minimum pressure drop.
The connection and valve mechanism is interlocked such that fully engaging and sealing the hose unit on its
matching tank unit can only open the valve. On disconnection the valve fully close before the coupling
separate and spillage therefore is negligible.

Operating Manual
PR-050823-0121 Version 161109 5 of 14
1.2 P RODUCT SPECIFICATION
Product name: Dry Cryogenic Coupling
Sizes: 1”, 2“, 2½“, 3“, 4” and 6“
Thread Connection: NPT-Thread ANSI B1.20.1
Flange Connection:
Other Connection:
Flange EN 1092, ANSI B16.5
On request
Material: EN 10272 – 1.4401/1.4404+AT
ASTM A479 – S31603 (316L)
Working pressure and classification according to PED 2014/68/EU:
Pressure accessories:
DDCouplings (STANAG), DGCouplings, DACouplings (ISO45), DCCouplings, SBCouplings and
CBCouplings
Conformity assessment procedure followed:
no CE-marking** SEP=sound engineering praxis Article 4 section 3*
CE 0038 Cat 1=Category 1 Module A
CE 0038 Cat 2=Category 2 Module D1
CE 0038 Cat 3=Category 3 Module G
For piping intended for gases, liquefied gases, gases dissolved under pressure, etc. according to article 4
paragraph 1.(c)(i) [Annex II Table 6]
SS Weight HU
NPT (6”FL)
Weight TU NPT
(4”+6”FL)
DN25 PN25 SEP* DN25 1,8 kg / 4.0 lbs 0,7 kg / 1.5 lbs
DN40 PN25 Cat 1 DN40 2,8 kg / 6.2 lbs 1,2 kg / 2.6 lbs
DN50 PN25 Cat 2 DN50 2,8 kg / 6.2 lbs 1,2 kg / 2.6 lbs
DN65 PN25 Cat 2 DN65 7,2 kg / 15,9 lbs 3,1 kg / 6.8 lbs
DN80 PN25 Cat 2 DN80 9,3 kg / 20.5 lbs 4,0 kg / 8.8 lbs
DN100 PN25 Cat 2 DN100 14,7 kg / 32.7 lbs 8,7 kg / 19.2 lbs
DN150
PN16 Cat 2
DN150 42,5 kg / 93.7 lbs 20,0 kg / 44.1 lbsPS23.3 bar Cat 2
PN25 Cat 3
* According to Article 4 section 3, the products designed and manufactured in accordance with the sound
engineering practice (SEP) must not bear the CE marking. Unauthorized product modifications lead to an
invalid declaration.
**Attention: If the coupling is Ex-marked the CE-marking is for ATEX classification
Maximum burst pressure: 125 bar (6” = 80 bar) / 1800 psi (6” = 1160 psi)
Temperature range: -196ºC to +80ºC / -320ºF to +175ºF
1.3 I DENTIFICATION PLATE E . G . FOR DCC 3”-3”NPT
Hose unit (Coupler) Tank unit (Adapter)
Article no: MC415A44* LC415A44*
Size: 3” – 3” NPT 3“ – 3” NPT
Working Pressure PS: 25 bar 25 bar
Material: Stainless Steel Stainless Steel
Seal: PTFE (Teflon®) PTFE (Teflon®)
PED MAWP ADR/RID ATEX
*For key of article no. please ask for explanation list.

Operating Manual
PR-050823-0121 Version 161109 6 of 14
1.4 S COPE OF DELIVERY
1 pcs MC415A44 DCCoupling 3” Hose unit with 3” NPT thread and/or
1 pcs LC415A44 DCCoupling 3” Tank unit with 3” NPT thread
In case of flange connection gaskets and bolts to mount the coupling into the application is not part of the
delivery. For NPT thread use PTFE tape 19mm x 0,2 mm for sealing.
2 G ENERAL S AFETY R ULES
For a safe operation, read this manual completely before operating this product.
Failure to follow the warnings may result in serious personal injury, environmental impact or property
damage caused by leakage or unexpected separation.
Before you install any MannTek equipment it is essential to check that the material and performance
specifications are acceptable for your specific application. The pressure ratings and primary materials of the
couplings are clearly indicated on the identification plate of each MannTek product. A drawing showing the
materials of construction relating to each individual component is available upon request. Specification
checks should always be carried out before the product is supplied, but if unsure, ask!
As with all equipment, a check should be made to ensure that the installation fulfils the requirements of
applicable prevailing industry, local, national and international standards. Particular attention should be paid
to pressure ratings, safety factors and the position of upstream and downstream affiliated closures.
2.1 S AFETY I NSTRUCTIONS
Wear proper safety clothing consists of thermal gloves, full face shield
approved for cryogenic use and solid shoes capable to withstand cryogenic
spill whenever operating Dry Cryogenic Couplings.
Make sure the operating space is clear to avoid accidental contact with others and the
coupling interface is clean and dry. Use dry air or nitrogen to blow out the coupling
interface.
Do not use the DCCoupling in any way, not described in the specification. The user is
responsible to comply with all applicable federal, state and local laws and regulations.
Do not operate the DCCoupling if there is any visible damage. Stop immediately if
leakage occurs.

Operating Manual
PR-050823-0121 Version 161109 7 of 14
Make sure that there is no trapped liquid or excessive pressure behind the tank unit
when connecting. Do not use external tools to make a connection.
Authorized and qualified personnel must carry out all assembly and maintenance
operations as described in this operating manual.
3 T RANSPORT AND S TORAGE
The product may only be transported or stored absolutely clean. Suitable protection must be used for both
openings to ensure no damage occurs to the surfaces/sealed areas. The storage location must guarantee
adequate protection from corrosion or extreme temperatures.
3.1 D ELIVERY C HECK
•Check for any transportation damage. If so report this immediately to the forwarder.
•Check that the products and quantities are in accordance with the delivery note.
3.2 C OMPLAINTS / R ETURN OF GOODS
•If returning goods please contact Mann Teknik AB to receive a Complaint Report form.
•Complete the form with as much details as possible.
•Return the goods with the Complaint Report attached on the outside of the package!
3.3 S TORAGE
Store coupling in a dry, dust free, dark place, in ambient temperature.
4 I NSTALLATION
4.1 I NITIAL O PERATION
The correct installation of all MannTek products is essential to ensure safe and satisfactory operation.
Checks should be made to ensure that the fitting of MannTek products does not interfere with the correct
operation of affiliated equipment (i.e. isolation valve, excess flow valves, etc). Before securing the flange or
thread connections to mating equipment (i.e. hose, loading arm and storage tank) ensure that no foreign
objects, dirt, grit, water (moisture) etc. are present in the coupling.
All flange and thread connections should be made without imparting excessive strain to the equipment. All
gaskets and sealing materials used to make the permanent connection should be of suitable material.

Operating Manual
PR-050823-0121 Version 161109 8 of 14
Each MannTek product is designed to take reasonable axial loads associated with good handling practice
but is not designed to accept continuous excessive load values associated with maladjustment or poor
installation. Continuous excessive strain will equate to increased component wear and possibly premature
failure if not corrected.
When MannTek equipment is used with hoses, attention should be paid to hose length to ensure correct
handling characteristics. The hose assembly should be designed such that the minimum hose length is
supported by the coupling or the operator. Hoses should be of sufficient length to ensure operation well
within the stipulated hose minimum bend radius up to the maximum operation envelope.
Once all the above elements are satisfactory, a function check should be carried out to prove the system.
The hose unit or coupler should connect and disconnect without physical interference or difficulty. Please
remember that the higher the static pressure, the greater the effort to make a connection.
4.2 I NSTALLATION
When installing MannTek equipment to new pipe work, tanks, etc. ensure the system is free from debris that
may be transferred through the coupling. Where the hose or loading arm assembly is the primary static
dissipation or earth route, the electrical continuity value of the assembly shall be checked to ensure
regulatory compliance. Special attention should be paid to the balancing of loading arms. It is usual for
loading arm balance settings to account of weight variations due to differences in the full / empty cycle. The
loading arm should be set to balance in the condition present at the time of connection.
Before mounting the DCCoupling ensure that trapped liquid never can occur in the installation.
In combination with a Break-Away or Emergency Release Coupling / Emergency Shut Down
Valve measures shall be taken to ensure that no liquid can be trapped in any operating mode.
Then the DCCoupling can be installed directly in the product line and is ready for use after removing the
transport protection. The installation is as follows:
a. Remove the packaging.
b. Check the coupling for damages before mounting.
c. Ensure that the product line is empty and all valves are closed before you assemble the coupling
into the line.
d. To prevent damages during mounting a suitable wrench should be used for the intended nut flats
on the coupling (threaded connection) or the bolts (flanged connection).

Operating Manual
PR-050823-0121 Version 161109 9 of 14
Flange connection
a. Table : Tightening torque
1
for bolts:
Metric Inch
Size 8.8 Size A193 B7
M8 24 Nm 5/16 -18 UNC 16 l f-ft
M10 50 Nm 3/8 -16 UNC 29 l f-ft
M12 85 Nm 1/2 -13 UNC 70 l f-ft
M16 210 Nm 5/8 -11 UNC 139 l f-ft
M20 410 Nm 3/4 -10 UNC 243 l f-ft
M22 550 Nm 7/8 -9 UNC 389 l f-ft
M24 700 Nm 1 -8 UNC 582 l f-ft
a. Bolt tightening sequence.
NPT thread connection
Sealing NPT threads can be an exasperating experience if certain techniques are not followed.
The following tips will help alleviate many common problems in thread sealing:
b. Always use some type of sealant (tape or paste) and apply sealant to male thread only. If using a hydraulic sealant,
allow sufficient curing time before system is pressurized.
c. When using tape sealant, wrap the threads in a clockwise motion starting at the first thread and, as layers are
applied, work towards the imperfect (vanishing) thread. If the system that the connection being made to cannot
tolerate foreign matter (i.e. air systems), leave the first thread exposed and apply the tape sealant as outlined above.
d. When using paste sealant, apply to threads with a brush, using the brush to work the sealant into the threads. Apply
enough sealant to fill in all the threads all the way around.
e. When connecting one stainless steel part to another stainless steel part that will require future disassembly, use a
thread sealant that is designed for stainless steel. This stainless steel thread sealant is also useful when connection
aluminium to aluminium that needs to be disconnected in the future. These two materials gall easily, and if the
correct sealant is not used, it can be next to impossible to disassemble.
f. When connecting parts made of dissimilar metals (i.e. steel and aluminium), standard tape or paste sealant performs
satisfactory.
1
The torque forces recommended bases on a thread friction coefficient µ=0,16 at 70% of the preload force

Operating Manual
PR-050823-0121 Version 161109 10 of 14
g. For sizes 2” and below, tape or paste performs satisfactory. When using thread tape, four wraps (covering all
necessary threads) are usually sufficient.
h. For sizes 2 1/2” and above, thread paste is recommended. If thread tape is used, eight wraps (covering all necessary
threads) are usually sufficient. Apply more wraps if necessary.
i. Over-tightening threads can be just as detrimental as insufficient tightening. For sizes 2” and below, hand tighten the
components and, with a wrench, tighten 3 full turns. For sizes 2 1/2” and above, hand tighten the components and,
with a wrench, tighten 2 full turns.
j. For stubborn to seal threads, apply a normal coating of thread paste followed by a normal layer of thread tape.
k. For extremely stubborn to seal threads, apply a normal coating of thread paste followed by a single layer of gauze
bandage followed by a single layer of gauze bandage followed by a normal layer of thread tape.
When this procedure is done, the connection becomes permanent. Extreme measures will be necessary to
disconnect these components. All other measures to deal the threads should be explored prior to use of this
technique.
The start-up may take place only when the DCCouplings has been mounted as instructed and the necessary
function tests and leak tests have been conducted by the approved authorities.
5 O PERATION
5.1 G ENERAL NOTES
Operators are obliged to provide qualified and trained personnel familiar with the handling of supply pipes,
safety couplings, any fluid being pumped as well as its danger potential. Such staff must also be familiar with
the applicable safety regulations and the regulations of the employer’s liability association. Notice also our
safety instructions (see chapter 2.1).
5.2 D AILY VISUAL INSPECTION
All couplings should be briefly inspected before each operation.
Inspect the coupling to be dry, clean and free of corrosion. Check for dirt and any obvious physical damage
(such as impacts, etc.).
Inspect the hose unit swivel for free rotation.
Inspect the tank- and hose unit for faultlessness and external signs of seizure.

Operating Manual
PR-050823-0121 Version 161109 11 of 14
5.3 P REPARATION FOR CONNECTION
Make sure the operating space is clear to avoid accidental contact with others and the
coupling interface is clean and dry. Use dry air or nitrogen to blow out the coupling
interface.
Before making the connection, make sure that there is no trapped liquid or excessive pressure
behind the tank unit when connecting.
If required by the application, be sure to connect the ground cable.
Take off the protection cap from the tank unit and the plug from the hose unit.
Blow out both couplings with dry compressed air or nitrogen to clear off any moisture or snow.
Do not connect!
Snow shall be blown
off!
OK to connect
Lift the hose unit and hose into position to start the connection. Take care to
support the hose end assembly so as to fit the hose unit to the tank unit in the
correct orientation.
It is important to ensure the hose unit is not supporting the full weight of the hose
assembly during the connection process. Once connected, the hose unit is
secure to the tank unit and able to accommodate all reasonable axial strain.
When correctly supported, the hose unit should slide easily over the tank unit.
The three rollers on the hose unit engage in the three slots on the tank unit in
any one of three positions at 120 degree centre.

Operating Manual
PR-050823-0121 Version 161109 12 of 14
5.4 M AKING CONNECTION / DISCONNECTION
Rotate the hose unit clockwise about 100 degrees whilst gently pushing towards
the tank unit. At the start of rotation you will feel some resistance. The level of
resistance is dependent upon the static line and tank pressure. The higher the
pressure the greater is the effort necessary to connect the coupling. At the
completion of the 100 degree turn you will feel a definite stop.
Further rotation does not tighten the connection or open the valves more, it only causes unnecessary
damage. The hose unit valve is now open and the loading process can start.
The sequence of isolation valve and/or pump operation should be taken from your operating procedures.
The disconnection procedure is similar to the connection procedure but in reverse. Closing the vehicle
isolation valve first is preferred so long as this is compatible with your standard operating procedures. The
most regulations are recommending boiling off the line from liquid and maybe purging the line with an inert
gas if flammable liquids have been handled.
Whilst supporting the hose unit assembly, turn the hose unit anti-clockwise approximately 100 degrees. You
may feel a slight “pop off” effect at the end of the rotation travel when transferring liquids with an elevated
vapour pressure. This is normal. Do not attempt to rotate the hose unit further. This will not further loosen the
connection or secure the seal, it only causes unnecessary damage.
After disconnection the plug shall always be fitted to the hose unit and the cap to the tank unit
immediately. This avoids moisture inside the connection interface. Condense water is a risk for
ice building during the next loading operation, which can cause a leakage or blocking the
interface connection after cooling down.
The hose assembly should be stowed in a manner so as to avoid physical damage. Do not drop the hose
end assembly or stow on the floor.
5.5 I MPROPER USE
The equipment should never be used in the case of visible damage or where there is prior knowledge of
damage that may lead to malfunction.

Operating Manual
PR-050823-0121 Version 161109 13 of 14
6 M AINTENANCE AND R EPAIR
6.1 G ENERAL INFORMATION
The operator is solely responsible for the installation, operation and maintenance of the coupling. Mann
Teknik AB accepts no responsibility for damages due to faulty installation, faulty handling, as well as
negligent or incorrect maintenance.
Maintenance tasks shall be performed only by trained personnel authorized by Mann Teknik AB. All
measures necessary for inspection, maintenance and repair must be carried out in accordance with the
national regulations of the country where the system is installed. Notice also our safety instructions (see
chapter 2.1).
6.2 M AINTENANCE AND SERVICE INSTRUCTION
6.2.1 Maintenance plan
Depending on the application, the wear on the single components can be very different. Every operator has
to make a risk analyze before the installation of Dry Cryogenic Couplings in his process. Outcome of this risk
analyze should be a maintenance plan for the entire equipment. Mann Tek can give some support based on
the experience with other similar applications.
These are the service steps, recommended by Mann Tek:
1. Replace sealings, bearings and washers.
2. Replace worn or damaged components.
3. Do not use any grease
6.3 D ISMANTLING
When the DCCoupling are taken out of service, the risk of liquid or gas spurting out should be taken into
consideration. Special protective measures such as personal protection equipment must therefore be
adopted.
How to dismantle:
Wear proper safety clothing consists of thermal gloves, full face shield
approved for cryogenic use and solid shoes capable to withstand cryogenic
spill whenever disassembling Dry Cryogenic Couplings from the installation .
Make sure that the coupling is depressurized and empty.
Unscrew coupling (threaded connection) or bolts (flanged connection) with a wrench, fit for
purpose.

Operating Manual
PR-050823-0121 Version 161109 14 of 14
Couple the repaired unit to a serviceable hose or tank unit as appropriate and check for correct operation of
the valve actuating and bayonet locking mechanism. Couple and uncouple the unit(s) several times.
7 A PPLICABLE D OCUMENTS
EC Guideline 97/23/EC PED, 94/9/EC ATEX
International Transport of Dangerous Goods ADR, RID, IMDG
Test standards EN12266, ISO5208
Thread standards ANSI B1.20.1 - Flange standards EN 1092, ANSI B16.5
For use in other countries:
Respective national requirements and guidelines
7.1 D ECLARATION OF C ONFORMITY
97/23/EC
PED –
Conformity
Declaration
© Copyright 2014 Mann Teknik AB. Mann Teknik AB reserves the right to make changes at any time in
prices, materials, specifications and models and to discontinue models without notice or obligations.
Mann Teknik AB
Strandvägen 16, S-54231 Mariestad, Sweden
Phone [phone] • Fax [phone]
www.mann-tek.com • [email protected]
Mann Teknik AB is a certified
ISO9001-company.