6 . Pressure Vessel CE authentication

release time :2021-12-24 15:37:48    

Pressure Equipment directive PED belongs

1 . PED Directive ?

With Europe ' s establishment of a unified market and the advent of the euro , in order to contribute to the pressure equipment in the EU member countries of EFTA , as far as possible in the most wide - ranging industrial fields within a unified the product technical regulations , the EU adopted in 1997 ( 97 / 23 / EC Pressure Equipment Directive ( PED ) instruction . PED Directive applies pressure ( gauge pressure ) is exceeding 0.5 bar of the pressure vessel ( including a non - contact direct flame heating and the pressure vessel is in direct contact with the flame - heated pressure vessel ) , piping , safety accessories such as safety valves or the like ) , accessories ( such as valves , etc . ) , breathing gas cylinders , pressure cookers , Portable fire extinguishers - containing equipment . May 2002 from the President of the People ' s Republic of China on April 29 , the pressure - bearing equipment design , manufacturing and assessment must meet the requirements of the PED . meet the requirements of PED Pressure Equipment with a CE flag . without the CE mark pressure equipment is not permitted to enter the EU market .

2 . What is the pressure equipment

Pressure - bearing equipment ( equipment ) : pressure vessels , pressure piping , safety accessories and pressure accessories . pressure equipment further comprises a pressure part with the part connected to , e.g . flanges , and , from a sleeve joint , a bracket and lifting lug etc .

( Pressure Vessels ) : contains the fluid , the pressure in the sealed space . in addition to the outside of the body , the pressure vessel also includes a container with the other devices connected to the first connector . A container may be made of a plurality of pressure chambers .

Pressure Piping ( Piping ) : pressurized fluid transmission between systems of plumbing . pressure conduit can be either a single tube , which in turn may be in the form of pipes , fittings , expansion joints , hoses , as well as other support device consisting of a pipe system . by the tubes in the rear of the air used for cooling or heating of the heat exchanger should be categorised as a pressure pipe

Safety accessories ( accessories ) : Used to Prevent exceeded the allowable limit of the device . Such devices include :

direct pressure limiting device : such as safety valves , bursting discs , the yield of the rod , the controlled release of the safety systems ( CSPRS ) ;

limiting apparatus : This device can control the operation of the device parameters , can also be closed or closing and linkage , such as a pressure switch , temperature regulating valve , level indicator , and safety - related control of the adjustment device ( ) .

Pressure accessories ( accessories ) : has a specific function and a certain space of the bearing device .

The complete equipment ( Assemblies ) : refers to two or more pressure - bearing equipment , the overall function of the combination device .

3 . This pressure equipment category determination

in accordance with the provisions of the PED , the manufacturer of pressure equipment classification . PED according to appendix II , the pressure - bearing equipment may be classified into three types I , II , III , IV , four qualified rating . For very low risk of pressure equipment may be mature Engineering Practice ( SEP ) classification . the higher the risk , then the classification of the higher grades , and the more stringent provisions . In addition to a pressure retaining device , in addition to the four qualified rating , along with pressure retaining materials are performed as authentication : PED 4 . 3 EN10204 Type 3.1 in EN10204 3 . 2 etc .

Bearing device for deciding the type of procedure :

Step 1 Analysis of the Pressure Equipment type , whether the exclusion clause .

Step 2 : The maximum allowable pressure is greater than 0.5 bar .

step 3 of the container within the category of analysis fluid ( liquid or gas ) . risk belongs to Group 1 , Group 2 of the other genera .

step 4 , analysis of pressure equipment , such as pressure vessels , piping , or other fuel to fire as well as the risk of overheating the pressure of the heater .

Step 5 , according to the following table selection decision table

4 . PED Pressure Equipment Requirements

SEP is divided into the units must be mature engineering practice to design and manufacture . SEP devices shall not bear the CE marking .

I ~ IV - bearing equipment , must meet the technical requirements in the PED and the essential safety requirements ( for short ) . PED Directive in Article 3 and Annex I , respectively , are given basic technical requirements and safety requirements .

class I equipment by the manufacturer for the purposes of internal control of production . Class I devices need to be attached without authorization is announced by the number of the CE marking .

Section II ~ IV pressure equipment to assess the needs of an EU Member State designated by the authorized agency involved in certification , and supervision of the manufacturer of the quality system , or directly for inspection . Section II ~ IV pressure equipment there is a need to stick with authorization is announced by the number of the CE marking .

5 . Conformity assessment mode selection

a manufacturer can base their choice of conformity assessment mode . on the basis of the categories of equipment , the manufacturer may choose to authorize the IAEA monitoring of the quality system , or a fully third - party inspection , or a combination of both systems . The manufacturer may select the applicable to a higher category of pressure equipment mode . the manufacturer may select the combination of the following :

conformity assessment mode selection is determined by the Pressure Equipment classification , taking into account the main equipment of the production type ( single - piece production or series production ) and quality management ( no quality assurance system of regular inspection or quality assurance system )

Each mode is described as follows :

conformity assessment mode selection is determined by the Pressure Equipment classification , taking into account the main equipment of the production type ( single - piece production or series production ) and quality management ( no quality assurance system of regular inspection or quality assurance system ) are described in detail in the following Table .

6 . The PED certification technology information needs

Product size and pressure specifications

Product description using the material

u in relation to design and test according to standard ( ASME , ANSI , API , BS EN . . . )

Product design

u shows that the stability of the product

u ( ISO 9001 quality system documents of certificate )

u material certifications available ( physical and chemical characteristics )

u test reports ( factory tests )

English u user manual , including installation , commissioning , use and maintenance instructions .

u with a CE mark on the product nameplate