Energi- och värmeöverföring

Kommittébeteckning: SIS/TK 111 (Vibration och stöt)
Källa: ISO
Svarsdatum: den 18 okt 2021
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This document describes the general requirements for evaluating the vibration of various coupled industrial machine types with a power above 15 kW and operating speeds between 120 min-1 and 30 000 min-1 when measurements are made in-situ. Guidelines for applying evaluation criteria are provided for measurements taken on non-rotating and rotating parts under normal operating conditions. The guidelines are presented in terms of both steady running vibration and any changes to vibration amplitude, which can occur in these steady values. The numerical values presented are intended to serve as guidelines based on worldwide machine experience, but shall be applied with due regard to specific machine features which may cause these values to be inappropriate. In general, the condition of a machine is assessed by consideration of both the shaft vibration and the associated structural vibration, as well as specific frequency components, which may not relate to the broadband severity values presented.
The machine types covered by this document include:
a) steam turbines and generators with outputs less than or equal to 40 MW (see Note 1 and Note 2);
b) steam turbines and generators with outputs greater than 40 MW which normally operate at speeds other than 1 500 min-1, 1 800 min-1, 3 000 min-1 or 3 600 min-1 (although generators seldom fall into this category) (see Note 1 and Note 2);
c) rotary compressors (see Note 2);
d) industrial gas turbines with outputs less than or equal to 3 MW (see Note 2 and Note 3);
e) turbofans (see Note 2);
f) electric motors of any type (see Note 4);
g) rolls and mills (see Note 5);
h) conveyors (see Note 5);
i) variable speed couplings;
j) blowers or fans (see Note 6).
NOTE 1 Land based steam turbines, gas turbines and generators of greater than 40 MW capacity, which run at 1500 min-1, 1800 min-1, 3000 min-1 or 3600 min-1 are covered by the requirements of ISO 20816-2; generators in hydro-electric plants are covered by ISO 20816-5;
NOTE 2 The proposed part 10 of this series of standards will be developed to cover high speed turbo-machinery. When that is completed, some machine types will be excluded from the scope of this document.
NOTE 3 Gas turbines of power greater than 3 MW are covered by ISO 20816-4
NOTE 4 When a motor is coupled to a machine covered by another part of ISO20816, the motor falls under this part if the coupling is flexible, but falls under the other standard if the coupling is rigid;

NOTE5 Machinery including a geared stage can fall under the scope of this document. However, the information relating to gearboxes - in particular, the conditions for performing acceptance tests and the influence of operating conditions (given in ISO 20816-9) - shall be taken into account when evaluating the vibration of gearboxes;
NOTE 6 The vibration criteria presented in this document are generally only applicable to fans with power ratings greater than 300 kW or fans which are not flexibly supported. As and when circumstances permit, recommendations for other types of fans, including those of lightweight sheet-metal construction, will be prepared. Until these recommendations are available, classifications can be agreed between the manufacturer and the customer, using results of previous operational experience, see also ISO 14694[4].
The following types of industrial machine are excluded from this document:
k) land-based gas turbines, steam turbines and generators with power outputs greater than 40 MW and speeds of 1 500 min-1, 1 800 min-1, 3 000 min-1 or 3 600 min-1 (see ISO 20816-2);
l) gas turbine sets with power outputs greater than 3 MW (see ISO 20816-4);
m) machine sets in hydraulic power generating and pumping plants (see ISO 20816-5);
n) reciprocating machines and machines solidly coupled to reciprocating machines (see ISO 20816-6);
o) rotodynamic pumps and any integrated or solidly coupled electric motors where the impeller is mounted directly on the motor shaft or is rigidly attached to it (see ISO 10816-7);
p) reciprocating compressor systems (See ISO 20816-8);
q) rotary positive displacement compressors (e. g. screw compressors);
r) submerged motor-pumps;
s) wind turbines (see ISO 10816-21).
The requirements of this document apply to in-situ broad-band vibration measurements taken on the shafts, bearings, bearing pedestals, or housings of machines under steady-state operating conditions within their nominal operating speed range. The requirements relate to both acceptance testing and operational monitoring. The evaluation criteria included in this document can be applied to both continuous and non-continuous monitoring situations.
The requirements of this document cover machines which may have gears or rolling element bearings, but do not address the diagnostic evaluation of the condition of those gears or bearings. (See ISO 20816-9).
The requirements in this standard are applicable only for the vibration produced by the machine set itself and not for vibration which is transmitted to the machine set from external sources.

Ämnesområden: Gasbrännare
Kommittébeteckning: SIS/TK 289 (Gassystem)
Källa: CEN
Svarsdatum: den 27 okt 2021
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This document specifies the safety, design, construction, and performance requirements and testing for gas filters for burners and appliances burning one or more gaseous fuels.
This document is applicable to:
— gas filters with declared maximum inlet pressure up to and including 600 kPa, of nominal connection size up to and including DN 250 for use with one or more fuel gases in accordance with EN 437:2009;
— gas filters specified as pressure accessories as defined by EU Directive 2014/68/EU (see Annex F).
NOTE 1 For pressure accessories, the requirements of EN 13611:2019, Annex F also apply.
NOTE 2 Requirements for pressures above 500 kPa are considered in subclause 6.3.1 by referring to EN 13611:2019, Annexes F to H.
This document is not applicable to gas filters that are connected directly to mains pipe-work or to a container that maintains a standard distribution pressure.

Ämnesområden: Gasbrännare
Kommittébeteckning: SIS/TK 289 (Gassystem)
Källa: CEN
Svarsdatum: den 27 okt 2021
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This document specifies the safety, construction and performance requirements for mechanical thermostats intended for use with gas appliances and similar use, hereafter referred to as ‘thermostats’.
This document applies to thermostats with declared maximum inlet pressures up to and including 50 kPa (500 mbar) of nominal connection sizes up to and including DN 50 for use with one or more fuel gases in accordance with EN 437.
This document applies to thermostats controlling the gas flow directly or indirectly through an integral gas valve.
This document only applies to thermostats used with gas appliances which are not installed in the open air.
Thermostats dealt with in this document are intended for control functions.
This document is not applicable to:
a) the thermocouple;
b) controls which use auxiliary energy (e.g. electrical energy supplied externally);
c) an assessment of the control regarding Performance Level (PL) and Safety Integrity Level (SIL).

Ämnesområden: Gasbrännare
Kommittébeteckning: SIS/TK 289 (Gassystem)
Källa: CEN
Svarsdatum: den 27 okt 2021
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This document specifies the safety, construction and performance requirements for thermoelectric flame supervision devices, energized by a thermocouple intended for use with gas burners, gas appliances and similar use, hereafter referred to as “controls”.
This document is applicable to controls with declared maximum inlet pressures up to and including 500 kPa (5 bar) of nominal connection sizes up to and including DN 50 for use with one or more fuel gases in accordance with EN 437.
This document is not applicable to:
a) the thermocouple;
b) controls which use auxiliary energy (e.g. electrical energy supplied externally).

Ämnesområden: Reaktorteknik
Kommittébeteckning: SIS/TK 405 (Kärnenergi)
Källa: ISO
Svarsdatum: den 30 nov 2021
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This documents applies to the reactor physics tests that are performed following a refueling or other core alteration of a PWR for which nuclear design calculations are required. This document does not address the physics test program for the initial core of a commercial PWR.
This document specifies the minimum acceptable startup reactor physics test program to determine if the operating characteristics of the core are consistent with the design predictions, which provides assurance that the core can be operated as designed. This document does not address surveillance of reactor physics parameters during operation or other required tests such as mechanical tests of system components (for example, the rod drop time test), visual verification requirements for fuel assembly loading, or the calibration of instrumentation or control systems (even though these tests are an integral part of an overall program to ensure that the core behaves as designed).

Kommittébeteckning: SIS/TK 601 (Termisk energi - validering av mätvärden)
Källa: SIS
Svarsdatum: den 3 dec 2021
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Detta dokument specificerar metoder för
— validering av mätvärden från termiska energimätare,
— bedömning av mätvärdenas rimlighet och
— efterberäkning av mätvärden i avsaknad av korrekta mätvärden.
Dokumentet omfattar inte tekniska krav på termiska energimätare.
Anm. För tekniska krav på termiska energimätare, se SS-EN 1434, alla delar [4].
Detta dokument är tillämpbart för leverantörer och kunder av termisk energi, samt för leverantörer av mätutrustning och programvaror för mätvärden.