Path:
Home >
GB >
Page71 > GB 5959.4-2008
Home >
Standard_List >
GB >
Page71 > GB 5959.4-2008
US$294.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB 5959.4-2008: Safety in electro-heat installations -- Part 4: Particular requirements for safety resistance heating installations
Status: Valid
GB 5959.4: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB 5959.4-2008 | English | 294 |
Add to Cart
|
3 days [Need to translate]
|
Safety in electro-heat installations -- Part 4: Particular requirements for safety resistance heating installations
| Valid |
GB 5959.4-2008
|
| GB 5959.4-1992 | English | 359 |
Add to Cart
|
3 days [Need to translate]
|
Safety in electroheat installations--Part 4: General requirements for resistance furnaces
| Obsolete |
GB 5959.4-1992
|
PDF similar to GB 5959.4-2008
Basic data
| Standard ID | GB 5959.4-2008 (GB5959.4-2008) |
| Description (Translated English) | Safety in electro-heat installations -- Part 4: Particular requirements for safety resistance heating installations |
| Sector / Industry | National Standard |
| Classification of Chinese Standard | K60 |
| Classification of International Standard | 25.180.10 |
| Word Count Estimation | 15,121 |
| Date of Issue | 2008-09-19 |
| Date of Implementation | 2009-06-01 |
| Older Standard (superseded by this standard) | GB 5959.4-1992 |
| Adopted Standard | IEC 60519-2-2006, IDT |
| Regulation (derived from) | Announcement of Newly Approved National Standards No. 16 of 2008 (No. 129 overall) |
| Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China |
| Summary | This Chinese standard applies to the following a) and b), respectively, regulations, work in the first and second voltage section indirect resistance heating equipment and direct resistance heating equipment. The purpose of this standard is to make the following direct and indirect safety requirements for resistance heating equipment standardization. |
GB 5959.4-2008: Safety in electro-heat installations -- Part 4: Particular requirements for safety resistance heating installations
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Safety in electroheat installations.Part 4. Particular requirements for safety resistance heating installations
ICS 25.180.10
K60
National Standards of People's Republic of China
GB 5959.4-2008/IEC 60519-2.2006
Replacing GB 5959.4-1992
Electric safety device
Part 4. Particular requirements for resistance heating means
(IEC 60519-2.2006, Safetyinelectroheatinstalations-
Part 2. Particularrequirementsforsafetyresistanceheatingequipment, IDT)
Published 2008-09-19
2009-06-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China issued
Table of Contents
Introduction Ⅲ
1 Scope 1
2 Normative references 2
2 3 Definitions
4 by category voltage electric equipment section 4
5 electric equipment by frequency classification section 4
6 General Requirements 4
7 isolation and closure 5
8 is connected to the internal connections and the grid 5
9 shock protection 5
10 overcurrent protection 6
11 6 equipotential bonding
And the control circuit 12 controls the function 6
Effect of heat shield 13 6
14 fire and explosion 7
15 nameplate, marking and technical documentation 8
Check heating apparatus 16, in operation, use and maintenance 8
GB 5959.4-2008/IEC 60519-2.2006
Foreword
This part of all except art in Chapter 16 of the mandatory content.
GB 5959 "electric safety devices" has the following 13 sections.
--- Part 1. General requirements (GB 5959.1-2005, IEC 60519-1.2003, IDT);
--- Part 2. Particular requirements for arc furnace apparatus (GB 5959.2-2008, IEC 60519-4.2006, IDT);
--- Part 3. Particular requirements for induction and conduction heating apparatus and an induction melting apparatus (GB 5959.3-2008,
IEC 60519-3.2005, IDT);
--- Part 4. Particular requirements (GB 5959.4-2008, IEC 60519-2.2006, IDT) resistance heating means;
--- Part 41. Particular requirements for resistance heating means for heating and melting glass --- means (GB 5959.41-2004,
IEC 60519-21.1998, IDT);
Safety regulations plasma apparatus (GB 5959.5-1991, eqv IEC 60519-5.. 1980) --- first portion 5;
--- Part 6. Safety Specification Industrial microwave heating apparatus (GB 5959.6-2008, IEC 60519-6.2002, IDT);
--- Part 7. Particular requirements for the apparatus having the electron gun (GB 5959.7-2008, IEC 60519-7.2008, IDT);
--- Part 8. Particular requirements for electroslag remelting furnace (GB 5959.8-2007, IEC 60519-8.2005, IDT);
--- Part 9. Particular requirements (GB 5959.9-2008, IEC 60519-9.2005, IDT) high-frequency dielectric heating apparatus;
--- Part 10. for industrial and commercial heating systems special requirements (IEC 60519-10.2005, to be transformed) resistor profiling;
--- Part 11. electromagnetic stirring of the liquid metal, transport or pouring special requirements (GB 5959.11-2000 device,
idt IEC 60519-11.1997);
--- Part 13. Particular requirements for the heating apparatus having an explosive atmosphere (GB 5959.13-2008).
In addition to this standard an outer part 13, are used to develop each of IEC 60519 part "safe heating apparatus" corresponds.
This is Part of 4 GB 5959.
This section is equivalent to using IEC 60519-2.2006 "Safety electrothermal Part 2. Particular requirements for resistance heating equipment" (section
Third Edition, in English).
For ease of use, for IEC 60519-2.2006, made in this section, the following editorial changes.
The term --- "this International Standard" by "this section";
--- standard name by a "safe heating apparatus Part 2. Particular requirements for resistance heating device," the name is changed;
--- deleted international standards foreword.
This partial replacement GB 5959.4-1992 "Safety fourth portion heating device. General requirements for resistance furnace", the latter as compared with the main
To technological change as follows.
--- 6 General requirements
a) 6.12.1 as new. Proposed requirements for immersion heaters maximum permissible rated voltage.
b) 6.14 to add requirements for a vacuum oven operating voltage.
--- 9.6.7 added a leakage current, touch current and protective conductor current level of safety considerations and references GB/T 12113-
2003 and IEC 60479-1.2005.
--- 15 nameplate, marking and technical documentation is new.
--- Check the heating device 16, in operation, use and maintenance
a) 16.2.2.1 on the leakage current, add a reference to the provisions of Chapter 4706.1-2005 16 GB ;
b) 16.2.2.3 with new information about the contact line current protection and current indicators and current content to human and animal effects,
And were cited GB/T 12113-2003 and IEC 60479-1.2005.
GB 5959.4-2008/IEC 60519-2.2006
This section should be used in conjunction with GB 5959.1-2005.
This section was proposed by China Electrical Equipment Industrial Association.
This part of the jurisdiction of the National Electric Industry Standardization Technical Committee (SAC/TC121) equipment.
This section was drafted. Furnace Co., Ltd. Xi'an Institute.
The main drafters of this section. Fan Chaoying, Ge Hua Shan.
This section replaces the following previously issued as follows.
--- GB 5959.4-1992.
GB 5959.4-2008/IEC 60519-2.2006
Electric safety device
Part 4. Particular requirements for resistance heating means
Range 1
This section applies to the GB 5959 in the following items a) and b) respectively predetermined work indirect electrical voltage in the first and second sections
Resistive heating device and a direct resistance heating apparatus.
The object of this is to make the following indirect and direct resistance heating apparatus safety requirements standardized.
a) indirect resistance heating equipment
These special requirements apply to indirect resistance heating device, which DC voltage or frequency up to 60Hz single phase of
Or multi-phase AC voltage.
Heat is heated by the current conductor of solid metal, solid non-metallic heating tube and a radiation conductor and flow immersion heater
produced.
Typically indirect resistance heating apparatus comprising.
--- non-continuous furnace, i.e., batch furnace. The muffle furnace, a crucible furnace, a shaft furnace, bell furnace, bogie hearth furnace, fluidized particles in the furnace, using
Immersion heaters metal bath furnace.
--- continuous furnace having a continuous or discontinuous charge transfer device. The roller hearth furnace, push-type furnace, stepping furnace, drum
Furnace, the rotary hearth furnace, a tunnel furnace (kiln), a continuous muffle furnace.
Typically indirect resistance heating apparatus further comprises.
--- heating the solid, liquid, or gas apparatus;
--- melting and holding apparatus;
--- separate heating element assembly (fixed or removable heater).
It may occur at particular risk indirect resistance heating apparatus comprising.
--- nitrite salt bath furnace.
--- may be generated during the heat treatment in a furnace atmosphere explosive indirect resistance heating apparatus. As the hydrogen and methane or propyl
Alkoxy mixed atmosphere with carbon monoxide in the furnace for carburizing.
--- having a protective (e.g., argon) and/or a reducing atmosphere indirect resistance heating apparatus. The gas carburizing, nitriding gas, carbon
Nitriding furnace.
--- a device having an infrared heating element.
These requirements do not apply to the IEC 60519-10.2005 profiling heating systems involved.
b) direct resistance heating apparatus
These requirements also apply to particular means of introduction of current from the electrode, for direct resistance heating or by being heated fluid charge
Thermal equipment. These devices include.
--- salt bath furnace electrodes;
--- glass melting furnace;
--- graphite furnace;
--- furnace production of silicon carbide.
These requirements do not apply since the processes used in GB 5959.3-2008, GB 5959.2-2008, GB 5959.8-2007 and
GB 5959.41-2004 involved in the direct resistance heating apparatus. In addition, they are not suitable for electrode steam boilers, water plus fast
Heat and the electrode pressure vessel.
GB 5959.4-2008/IEC 60519-2.2006
2 Normative references
Terms of the following documents constitute provisions of this section by reference in this part of GB 5959. For dated references,
All subsequent amendments (excluding corrections) or revisions do not apply to this section, however, encouraged to reach an agreement under this section
Whether the parties to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.
GB/T 2900.23-2008 Electrotechnical term industrial heating means (IEC 60050-841.2004, IDT)
GB 4208-2008 shell protection (IP code) (IEC 60529.2001, IDT)
GB 4706.1-2005 and similar household electrical appliances Part 1. General requirements (IEC 60335-1.2001, IDT)
GB 5959.1-2005 electric safety devices - Part 1. General requirements (IEC 60519-1.2003, IDT)
Safety Part 2 GB 5959.2-2008 electrothermal. Particular requirements for arc furnace apparatus (IEC 60519-4.2006, IDT)
Part 3 GB 5959.3-2008 Safety heating means. Laid induction and conduction heating apparatus and an induction melting apparatus
Specific requirements (IEC 60519-3.2005, IDT)
Safety Part 41 GB 5959.41-2004 heating means. resistance heating means for heating and melting glass --- means
Particular requirements (IEC 60519-21.1998, IDT)
GB 5959.8-2007 Safety Section 8 electrothermal. Particular requirements for electroslag remelting furnaces (IEC 60519-8.2005, IDT)
GB/T 10066.1-2004 Test Method heating apparatus Part 1. Common Part (IEC 60398.1999, MOD)
Measurement GB/T 12113-2003 touch current and protective conductor current (IEC 60990.1999, IDT)
GB 16895.2-2005 Electrical installations of buildings Part 4-42. Security Protection against thermal effects (IEC 60364-4-42.
2001, IDT)
GB/T 13870.1-2008 current effects on human beings and livestock Part 1. Common Part (IEC 60479-1.2005, IDT)
GB/T 17045-2008 Protection against electric shock device and a generic device (IEC 61140.2001, IDT)
IEC 60364-4-41.2005 low voltage electrical installations Part 4-41. 1 safety Protection against electric shock)
IEC 60519-10.2005 Safety Part heating means 10. heating systems for industrial and commercial requirements of the special profiling resistor
1) adopt standard case. Part 4-41 GB 16895.21-2004 building electrical devices. safety against electric shock (currently valid) (to IEC
60364-4-41.2001, IDT).
3 Terms and Definitions
GB 5959.1-2005 and GB/T 2900.23-2008 and the following terms and definitions apply to this section.
3.1
Direct resistive heating member which contacts with the charge and the current is transferred to the charge.
3.2
The electrical energy into heat for a conductor.
Note. The term "heat conductor" often use "heating resistor" alternate.
3.3
The molten glass in the bath the thermal current directly flows generated by the oven to achieve, in which the electrode is immersed in the bath furnace.
3.4
Salt bath furnace is mainly used as the heat transfer fluid.
Note. direct heating or indirect heating may be achieved. Direct heating of the heating element assembly (the heater) was placed in a salt bath (the heater or electrodes immersed
Salt bath); indirect heating of the heating element assembly (the heater) is placed outside the cylindrical body or the crucible.
GB 5959.4-2008/IEC 60519-2.2006
3.5
In a metal cylinder or a crucible filled with sodium or potassium nitrite or nitrate salt bath, or a mixture of these salts consisting of a salt bath
Bath furnace.
3.6
The upper layer of the solidified bath melted first auxiliary heating means.
3.7
A furnace for melting the solid charge.
3.8
Has been added so that the melting furnace charge, furnace maintained at a predetermined temperature in the molten state.
3.9
Used to transfer heat from the charge to a liquid or gas heating element assembly (the heater).
3.10
Movable by a user or replaced without removing any other components (e.g., the furnace refractory and insulating material) of the heating element and/or addition
Thermal element assembly (the heater).
NOTE. When using movable without interrupting the heating element during operation and/or heating element assembly (the heater) is referred to as "movable in use."
3.11
It refers to disconnect the power supply device of the heating device when the temperature exceeds a predetermined value.
Note. a resettable thermal cut, and non-resettable fuses, need for replacement after each operation.
3.12
When the operating temperature of the heating device exceeds a predetermined value, the device is disconnected and maintained at the power supply device power-off state.
Note. Over-temperature limiter can only be set by professionals, lock or reset.
3.13
Furnace temperature control means so as not to exceed a predetermined value or below.
Note. The temperature controller can be set or locked by professionals.
3.14
It refers to the current into the earth or in an outer conductive member during normal operation by the heating means.
Note 1. The leakage current may have a capacitive component, the capacitive component comprising a capacitor using caution due.
Note 2. The leakage current value of the electric hot and cold apparatus may be different.
3.15
The former, when current flows through the one or more accessible parts of the human or animal contact with the electric heating means or electric equipment.
GB 5959.4-2008/IEC 60519-2.2006
3.16
In the current flowing through the protection line.
3.17
Heat is transferred to the bath by an electrical heating element insulation and jacketing.
NOTE. immersion heater may be fixed or movable.
4 voltage electric equipment according to the classification section
According to GB 5959.1-2005 4.2.1 and 4.2.2.
5 electric equipment by frequency classification section
According to GB 5959.1-2005 Chapter 5.
6 General requirements
In addition to the following supplemental terms, according to Chapter 6 GB 5959.1-2005 requirements.
Additional Terms.
Resistivity 6.7
When electric equipment design and selection, consider the resistance heating conductor (for indirect resistance heating) or in some cases the charge
Resistance (for a direct resistance heating) change during operation.
6.8 auxiliary equipment
Deal with operations, transport and handling, and other auxiliary equipment to take protective measures, it does not pose a risk.
Exposed heating conductors 6.9
Typically, the heat conductor exposed so as not to be disposed with the staff handling charge or charge delivery device in contact under normal operating conditions
Touch, but in line with the IEC 60364-4-41.2005 Power Safety Extra Low Voltage (SELV) supply is required except for the exposed heating conductors.
6.10 leakage current
Protective measures should enable staff to the risk of electrical accidents caused by the leak current does not occur under normal operating conditions.
Should take effective measures to ensure that flow through the furnace with a charge or leakage current flowing through the charge does not cause any dangerous electrical accidents.
6.11 steam, precipitate and scum produced by the charge
Of charge produces steam, precipitate and the like trash, consider physicochemical may have on its staff and/or heating apparatus
effect.
6.12 salt bath furnace and the melting furnace
And 6.12.1 of the salt bath furnace such as galvanized aluminum or other bath furnace was incubated with which immersion heaters allows maximum rated voltage should be
400V.
6.12.2 should be clearly marked at a temperature controller or a temperature indicator (see 13.9.1) on the maximum allowable temperature of the salt bath.
6.12.3 nitrite salt bath furnace for processing aluminum or wrought aluminum alloys can not be used to process workpieces made from the following materials.
--- cast aluminum alloy;
--- unknown elements of aluminum;
--- other light metals and their alloys;
--- Heavy metals and their alloys;
---steel.
If the furnace temperature may exceed the runtime 550 ℃, it should be obvious in the outer furnace shell is marked "not for light metal" warning message.
GB 5959.4-2008/IEC 60519-2.2006
6.12.4 furnace to heat, disposed immersion heating element assembly (heater) such that it does not produce the deposits.
6.12.5 depth of more than 1.5m bath, unless take other precautions, or should be provided to ensure that no risk when preheating
Insurance preheating means for forming vertical channels in the solidified melt in the bath.
6.12.6 External thermal furnace, a heating element assembly (heater) should normally be installed on the furnace wall, in order to avoid local overheating bottom.
6.12.7 large external heating type melting furnace, can not be avoided when heated at the bottom, it should meet the following requirements.
--- bottom surface of unit power should be heated, the manufacturer should make a predetermined value depending upon the particular application lower than the furnace wall;
--- should be able to separately control the heating of the bottom;
--- circuit design should ensure that when the first pre-heating the furnace wall of the crucible;
--- only when the bloom in the crucible was heated by a separate furnace wall and has partially melted, in order to supply heat to the hearth.
Warming body coagulation bath 6.13
When the solidified body in the pre-heat bath, to be noted that part of the surface of the surface should be injected in order to avoid liquefaction.
Electrodes salt bath furnace, a preheating means should generate sufficient current at the initial stage, in order to avoid the ejection slot thereof.
Vacuum furnace 6.14
Vacuum oven, under vacuum member in a state without the applied voltage to be a breakdown or flashover.
And opening and closing the isolation 7
In addition to these additional regulations, according to GB 5959.1-2005 Chapter 7 requirements.
7.1 supplement. precautions should be taken so that wind up manually cut off the power supply heating equipment operator position is safe.
8 is connected to the grid connection and internal
According to GB 5959.1-2005 requirements of Chapter 8.
9 electric shock protection
In addition to these additional regulations, according to Chapter 9 GB 5959.1-2005 requirements.
Additional Terms.
9.5 Protection against direct contact
9.5.1 AC operating voltage exceeds 25V or 60V DC electric conductor having an exposed heating device, which when the door or the like closing
After the apparatus (such as a cover or plate) is turned on, the charge in contact with the tool, or heating the exposed conductor can be reliably cut off should be turned on with the door
All heating means ungrounded conductor of the power supply.
9.5.2 If the heating device accessible components (e.g., a ceramic member) becomes under normal operating conditions has conductivity, the apparatus can be full
The same requirement foot 9.5.1.
9.5.3 to reliably open the contacts, application of mechanical safety switch operating lever.
9.5.4 Design and arrangement of the safety device, so that protection should not be weakened, even when the return spring of the operating mechanism remains fracture
Can play a protective role.
9.5.5 When the instantaneous contact when the safety limit switches, there is a separate circuit breaker (e.g., a contactor) to reliably disconnect all the wires
(Other than ground). If a plurality of security systems, they may be the operation of the same device.
9.5.6 When it is necessary to use other control means instead of mechanically operated safety switch with normally closed contacts, with the same make sure
Level of protection.
Note. When the power supply control device or circuit failure or the relevant control device is interrupted, still play a protective role.
9.5.7 When used in line with IEC 60364-4-41.2005 requirements "safety extra low voltage" (SELV) as protective measures may be waived
Additional shock protection measures during normal use of electric equipment.
GB 5959.4-2008/IEC 60519-2.2006
9.6 Protection against indirect contact
9.6.1 due to operational reasons required to open the door during the continuous power supply of electric equipment, such as enamel pit, a forging furnace, molten light metal bore
Furnace, etc., should pay special attention to, to take appropriate protective measures, such as extending into the furnace charge mechanism should be taken insulation or grounding, the operator
Personnel should wear appropriate shoes and gloves, the workplace should be kept dry and ensure that these and other measures to improve the protection and reliable. In addition, the establishment of appropriate
Hazard warning labels, to draw attention of the staff.
9.6.2 continuous furnace, Ruoyin operation mode can not be provided to prevent contact with the heating conductor exposed electrical protection, it furnace port structure
It should prevent the heating conductor when the bare charge out of contact.
9.6.3 Some of the furnace, when the furnace with the ground separable parts will be disconnected before switching off the furnace power through the contactor, it is desirable to take Laid
Special protective measures (such as setting danger sign). For example the shaft furnace with a furnace pot the case of this case, which is movable generally in vessel, which itself
And as a cover plate of the heating chamber without a special lid.
9.6.4 If the protection line in danger of being broken, it should take appropriate measures, such as.
--- GB 5959.1-2005 measures 9.2 and the 9.3;
--- newly lay a single protection line;
--- using a transformer having separate windings so as to isolate the power supply system;
--- using residual current operated circuit breaker;
--- monitoring the insulation condition.
9.6.5 In normal operation or failure, if possible on the sensor (e.g. a temperature sensor) and the measuring circuit has a shock hazard
Contact voltage, then it shall IEC 60364-4-41.2005 to take appropriate protective measures.
9.6.6 electrothermal heater means for heating the immersion liquid, or other conductive medium, allowed as shock protection device class Ⅱ
(See GB/T 17045-2008).
9.6.7 leakage current should be considered, in contact with a suitable current level of security and protection of the line current (see GB/T 12113-2003 and
GB/T 13870.1-2008).
9.6.8 leakage current detecting system installation should ensure that any malfunction or failure to detect electrical insulation system and take appropriate action immediately.
10 overcurrent protection
According to GB 5959.1-2005 requirements of Chapter 10.
11 equipotential bonding
According to GB 5959.1-2005 requirements of Chapter 11.
And the control circuit 12 controls the function
According to GB 5959.1-2005 requirements of Chapter 12.
Protective effects of heat 13
In addition to these supplements, according to GB 5959.1-2005 requirements of Chapter 13.
Additional Terms.
13.6 resistive heating device surface temperature
Design, installation and operation of heating equipment, the device should be considered even when inadvertently left unattended or powered closing, because the equipment is not
The generated heat to produce any harm to workers, the environment and charge.
GB 16895.2-2005 and requirements are different, there should be the following requirements.
a) is not required during normal use and accessible within arm's reach parts of electric equipment, the surface temperature can be
GB 5959.4-2008/IEC 60519-2.2006
GB 16895.2-2005 values given in Table 42A.
b) In this regard, in the instructions for use should be given a warning and a warning flag is set on the appropriate electric equipment.
Special measures 13.7
For failure (e.g., temperature controller failure) may produce dangerous situations when the temperature-limiting safety device should be provided. These assemblies
Set in the function and should be electrically independent of each other.
When both electronic power controllers and circuit breakers and off frequently when using an electromagnetic contactor, a separate connection should otherwise
Contactor for cutting the supply of electric equipment.
A case where a plurality of furnaces, each furnace control system to be disconnected each furnace supply through respective contacts.
13.8 Temperature safety device
Temperature control circuit is able to ensure the safety when a fault occurs, in Table 1 for different security levels provides heat to be taken with or
Respective safety devices and safety measures.
These safety devices include.
--- thermal fuses (A);
--- fuse (B);
--- over-temperature limiter (C);
--- temperature controller (D).
Table 1 Thermal Safety
Ob...
Tips & Frequently Asked Questions:
Question 1: How long will the true-PDF of GB 5959.4-2008_English be delivered?
Answer: Upon your order, we will start to translate GB 5959.4-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.
Question 2: Can I share the purchased PDF of GB 5959.4-2008_English with my colleagues?
Answer: Yes. The purchased PDF of GB 5959.4-2008_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.
Question 3: Does the price include tax/VAT?
Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs):
List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?
Answer: Yes. If you need your currency to be printed on the invoice, please write an email to
[email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.
Question 5: Should I purchase the latest version GB 5959.4-2008?
Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB 5959.4-2008 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.