Spirax Sarco TD62LM Manuel utilisateur

IM-P015-04-EN-ISS2 CMGT

1. Safety information

2. General product information

3. Installation

4. Commissioning

5. Operation

6. Maintenance

7. Spare parts

Printed in GB

0686550/5

TD62LM and TD62M

Thermodynamic Steam Traps

with Replaceable Seats

Installation and Maintenance Instructions

IM-P015-04-EN-ISS2

CMGT

PREVIOUS REFERENCE NO. IM-P068-58

IM-P015-04-EN-ISS2 CMGT

Safe operation of these products can only be guaranteed if they are properly installed,

commissioned, used and maintained by qualified personnel (see Section 1.11) in compliance

with the operating instructions. General installation and safety instructions for pipeline and plant

construction, as well as the proper use of tools and safety equipment must also be complied with.

1.1 Intended use

Referring to the Installation and Maintenance Instructions, name-plate and Technical Information

Sheet, check that the product is suitable for the intended use/application. These products comply

with the requirements of the Pressure Equipment Directive (PED) and all fall within category 'SEP'.

It should be noted that products within this category are required by the Directive not to carry

the mark.

i) These products have been specifically designed for use on steam, air or condensate/water,

which is in Group 2 of the above mentioned Pressure Equipment Directive. The products’ use

on other fluids may be possible but, if this is contemplated, Spirax Sarco should be contacted

to confirm the suitability of the product for the application being considered.

ii) Check material suitability, pressure and temperature and their maximum and minimum values.

If the maximum operating limits of the product are lower than those of the system in which it

is being fitted, or if malfunction of the product could result in a dangerous overpressure or

overtemperature occurrence, ensure a safety device is included in the system to prevent such

over-limit situations.

iii) Determine the correct installation situation and direction of fluid flow.

iv) Spirax Sarco products are not intended to withstand external stresses that may be induced

by any system to which they are fitted. It is the responsibility of the installer to consider these

stresses and take adequate precautions to minimise them.

v) Remove protection covers from all connections and protective film from all name-plates, where

appropriate, before installation on steam or other high temperature applications.

1.2 Access

Ensure safe access and if necessary a safe working platform (suitably guarded) before attempting

to work on the product. Arrange suitable lifting gear if required.

1.3 Lighting

Ensure adequate lighting, particularly where detailed or intricate work is required.

1.4 Hazardous liquids or gases in the pipeline

Consider what is in the pipeline or what may have been in the pipeline at some previous time.

Consider: flammable materials, substances hazardous to health, extremes of temperature.

1.5 Hazardous environment around the product

Consider: explosion risk areas, lack of oxygen (e.g. tanks, pits), dangerous gases, extremes of

temperature, hot surfaces, fire hazard (e.g. during welding), excessive noise, moving machinery.

1. Safety information

IM-P015-04-EN-ISS2 CMGT

1.6 The system

Consider the effect on the complete system of the work proposed. Will any proposed action (e.g.

closing isolation valves, electrical isolation) put any other part of the system or any personnel

at risk?

Dangers might include isolation of vents or protective devices or the rendering ineffective of

controls or alarms. Ensure isolation valves are turned on and off in a gradual way to avoid system

shocks.

1.7 Pressure systems

Ensure that any pressure is isolated and safely vented to atmospheric pressure. Consider double

isolation (double block and bleed) and the locking or labelling of closed valves. Do not assume

that the system has depressurised even when the pressure gauge indicates zero.

1.8 Temperature

Allow time for temperature to normalise after isolation to avoid the danger of burns.

1.9 Tools and consumables

Before starting work ensure that you have suitable tools and/or consumables available. Use only

genuine Spirax Sarco replacement parts.

1.10 Protective clothing

Consider whether you and/or others in the vicinity require any protective clothing to protect against

the hazards of, for example, chemicals, high /low temperature, radiation, noise, falling objects,

and dangers to eyes and face.

1.11 Permits to work

All work must be carried out or be supervised by a suitably competent person.Installation and

operating personnel should be trained in the correct use of the product according to the Installation

and Maintenance Instructions.

Where a formal 'permit to work' system is in force it must be complied with. Where there is no such

system, it is recommended that a responsible person should know what work is going on and, where

necessary, arrange to have an assistant whose primary responsibility is safety.

Post 'warning notices' if necessary.

1.12 Handling

Manual handling of large and/or heavy products may present a risk of injury. Lifting, pushing,

pulling, carrying or supporting a load by bodily force can cause injury particularly to the back.

You are advised to assess the risks taking into account the task, the individual, the load and the

working environment and use the appropriate handling method depending on the circumstances

of the work being done.

1.13 Residual hazards

In normal use the external surface of the product may be very hot. If used at the maximum

permitted operating conditions the surface temperature of some products may reach temperatures

of 500 °C (932 °F).

Many products are not self-draining. Take due care when dismantling or removing the product from

an installation (refer to ‘Installation and Maintenance Instructions’).

1.14 Freezing

Provision must be made to protect products which are not self-draining against frost damage in

environments where they may be exposed to temperatures below freezing point.

IM-P015-04-EN-ISS2 CMGT

1.15 Safety information - product specific

See Section 6 'Maintenance' of this document for specific details relating to these products.

1.16 Disposal

Unless otherwise stated in the Installation and Maintenance Instructions, this product is recyclable

and no ecological hazard is anticipated with its disposal providing due care is taken.

1.17 Returning products

Customers and stockists are reminded that under EC Health, Safety and Environment Law,

when returning products to Spirax Sarco they must provide information on any hazards and the

precautions to be taken due to contamination residues or mechanical damage which may present a

health, safety or environmental risk. This information must be provided in writing including Health

and Safety data sheets relating to any substances identified as hazardous or potentially hazardous.

IM-P015-04-EN-ISS2 CMGT

2.1 General description

The TD62LM and TD62M are maintainable high pressure thermodynamic steam traps with integral strainer

and a replaceable seat to ease maintenance. They have been designed specifically for steam mains drainage

applications. The body castings are produced by a TÜV approved supplier in accordance with AD-Merkblatt

WO/TRD100 and are available with screwed, socket weld or flanged connections.

The TD62LM is specifically designed for relatively small condensate loads on superheat and mains drainage

applications.

An insulating cover is fitted as standard on both the TD62M and TD62LM.

Available types

TD62LM with low capacity orifice.

TD62M with standard orifice.

Standards

This product fully complies with the requirement of the Pressure Equipment Directive (PED).

Certification

This product is available with certification to EN 10204 3.1.

Note: All certification/inspection requirements must be stated at the time of order placement.

Note: For additional information see the following Technical Information Sheets:

TI-P068-08 (screwed and socket weld),

TI-P068-19 (EN body with flanged connections),

TI-P068-20 (ASTM body with flanged connections).

2.2 Sizes and pipe connections

ASTM body - ASTM A217 WC6

½", ¾" and 1" with screwed NPT or socket weld (ASME/ANSI B 16.11 Class 3000) connections DN15, DN20

and DN25 - standard flanges ASME/ANSI B 16.5 Class 300 and 600, JIS/KS 40.

EN body - EN 10213-2 G17 CrMo5-5+QT

DN15, DN20 and DN25 - standard flange EN 1092 PN100.

Fig. 2 Flanged

Fig. 1 Screwed/socket weld

2. General product information

IM-P015-04-EN-ISS2 CMGT

2.3 Pressure/temperature limits

The product must not be used in this region.

The product should not be used in this region or beyond its operating range as damage to

the internals may occur.

A - BFlanged to ASME/ANSI B 16.5 Class 600

A - CFlanged to JIS/KS 40

A - DFlanged to ASME/ANSI B 16.5 Class 300

Pressure bar g

Temperature °C

ASTM

(flanged)

Temperature °C

(flanged)

Pressure bar g

Temperature °C

Pressure bar g

Steam saturation curve

Screwed

and socket

weld

Steam saturation curve

Pressure psi g

Temperature °F

Pressure psi g

Temperature °F

Pressure psi g

Temperature °F

Steam saturation

curve

IM-P015-04-EN-ISS2 CMGT

Body design conditions

Screwed ASME/ANSI 600

Socket weld ASME/ANSI 600

EN body PN100

ASTM body ASME/ANSI 600

PMA

Maximum

allowable

pressure

Screwed 103 bar g @ 93 °C (1 494 psi g @ 199 °F)

Socket weld 103 bar g @ 93 °C (1 494 psi g @ 199 °F)

EN body 98.1 bar g @ 300 °C (1 422 psi g @ 572 °F)

ASTM body 103 bar g @ 93 °C (1 494 psi g @ 199 °F)

TMA Maximum allowable temperature 525 °C @ 42.7 bar g (977 °F @ 619 psi g)

Minimum allowable

temperature

Screwed 0°C (32 °F)

Socket weld 0°C (32 °F)

EN -10 °C (14 °F)

ASTM 0°C (32 °F)

PMO Maximum operating pressure for steam

service 62 bar g @ 482 °C (899 psi g @ 899 °F)

TMO Maximum operating temperature 525 °C @ 42.7 bar g (977 °F @ 619 psi g)

Minimum operating

temperature

TD62LM 0°C (32 °F)

TD62M 0°C (32 °F)

PMOB

Maximum

operating

backpressure

TD62LM 50% of upstream pressure

TD62M 80% of upstream pressure

Minimum operating

pressure

Note: These figures

relate to normal

operating conditions

and not start-up.

TD62LM

Low

capacity

version

8 bar g @ 175 °C (116 psi g @ 347 °F)

TD62M Standard

version 1.4 bar g @ 126 °C (20 psi g @ 259 °F)

Designed for a maximum cold

hydraulic test pressure of:

ASTM 155 bar g (2 248 psi g)

EN 150 bar g (2 175 psi g)

IM-P015-04-EN-ISS2 CMGT

Note: Before actioning any installation observe the 'Safety information' in Section 1.

Referring to the Installation and Maintenance Instructions, name-plate and Technical Information Sheet,

check that the product is suitable for the intended installation.

3.1 Check materials, pressure and temperature and their maximum values. If the maximum operating

limit of the product is lower than that of the system in which it is being fitted, ensure that a safety

device is included in the system to prevent overpressurisation.

3.2 Determine the correct installation situation and the direction of fluid flow.

3.3 Remove protective covers from all connections and protective film from all name-plates, where

appropriate, before installation on steam or other high temperature applications.

3.4 The preferred installation is in a horizontal pipe with the insulating cover uppermost (see Figure 3).

The trap will operate in any position, but the service life may be affected.

Note: When a socket weld trap is being installed the welding should be carried out to an approved

procedure of a recognised standard.

3.5 Observe the flow direction markings on the trap body. Stop valves should be installed so as to

permit the isolation of the trap from both supply and return line pressure. If the trap discharges to

atmosphere, the discharge should be directed to a safe place.

Note: the disc and seating surfaces of these traps have been produced to a high degree of flatness

to achieve good shut-off under high pressure conditions. An integral strainer helps prevent dirt and

scale from entering the trap. If particles become entrapped between the disc and seat, the high

flow velocities can cause rapid wear and erosion. A separate strainer and/or dirt pocket will provide

additional protection.

3.6 Access for removal of the integral strainer screen should be provided.

3.7 The insulating cover may be removed to facilitate installation, but it must be replaced before the

trap is put into service.

Note: If the trap is to discharge to atmosphere ensure it is to a safe place, the discharging fluid may be at

a temperature of 100 °C (212 °F).

3. Installation

IM-P015-04-EN-ISS2 CMGT

Fig. 3 Typical installation

Steam main

Stop valve

TD62LM

TD62M

Dirt leg

Drain valve

Strainer

To drain or return

To drain

Alternative layout

Suggested drop leg if the TD62LM or TD62M is located

more than 2 m (6 ft) away from the main drop leg.

Stop valve

IM-P015-04-EN-ISS2 CMGT

4.1 General information

After installation or maintenance ensure that the system is fully functioning. Carry out tests on any alarms

or protective devices.

4.2 Commissioning with particular reference to venting air

(refer to Figure 4).

With high pressure systems, initial start-up can take several hours (or days) to bring the system to normal

operating pressure and temperature. Even if the trap has replaced another trap while the main system has

remained running, it may still be necessary to vent air from the drop leg. If the trap is some distance from

stop valve 'A', it could be possible to air lock the pipework between valve 'A' and the TD62M or TD62LM

(i.e. the trap closes to air and does not readily allow steam to enter the pipework). To overcome this on

start-up the following procedure should be adopted. With stop valve 'B' closed, drain valve 'C' open, slowly

and partially open stop valve 'A'. This will discharge the air, condensate and any pipe debris. Valve 'C'

should be fully closed, and valves 'A' and 'B' slowly opened to the fully open position.

When the trap is more than 2 m (6 ft) away from the vertical drain leg, a suitable drop leg at the inlet to the

trap can improve its service life by ensuring that the trap does not see a mixture of steam and condensate.

Important note:

After the trap has been in service at normal operating pressure and temperature for 24 hours, it is

essential that the cover nuts are retightened (see Table 1 page 14 for the recommended tightening

torques). This will ensure the correct compression of the gasket under service conditions.

The TD62LM and TD62M are thermodynamic steam traps which use a disc to control the release of

condensate and to trap steam. The trap cycles open and closed to discharge condensate close to steam

temperature and closes tight between discharges. The disc, which is the only moving part, rises and falls

in response to dynamic forces produced by the partial re-evaporation (flashing) of hot condensate. Cool

condensate, air and other non-condensible gases enter the trap through the central orifice, lift the disc,

and are discharged through the outlet orifice. When the condensate approaches steam temperature, a

portion of it flashes as it enters the trap. The flash steam passes at high velocity over the underside of

the disc and collects in the control chamber above. The resulting pressure imbalance forces the disc

downward onto the seating surfaces, stopping the flow. The trap remains tightly closed until the loss of

heat through the trap body lowers the control chamber pressure, allowing the inlet pressure to raise the

disc and repeat the cycle. An insulating cover prevents the trap being unduly influenced by excessive heat

loss when subjected to low ambient temperatures, wind, rain, etc.

4. Commissioning

5. Operation

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