Before manufacturing or revising the Category Ι pressure vessels, the Manufacturer shall fill the type inspection application (Annex 31) and submit the application along with the documents listed below at local inspecting organizations:
1. Type, detailed structure drawings and strength calculation sheet for the Category Ι pressure vessel applying for inspection.
2. Type, capacity and quantity of the manufacturing and inspection equipment.
3. Educational background and working experience of the chief designer.
4. Educational background and working experience of the principal of construction.
5. Qualifications and number of constructors.
6. For sealing manufacture or revision, qualification certificates of the sealer, procedure of sealing and records of qualification inspection for sealing procedure shall be provided.
Any alteration of the equipment stipulated in subparagraph 2 or personnel stipulated in paragraphs 3,4 of the previous paragraph shall be reported to the local inspecting organization.
The inspecting organization shall issue the Qualification Certificate of Type Inspection for Manufacturing Equipment (Annex 2) for qualifiers in the type inspection as stipulated in Paragraph 1.
The manufacture or revision shall not be carried out without passing the inspection. However, this shall not apply to types and conditions that have already passed the type inspection.

For the manufacturing of Category Ι pressure vessels, except those made by a whole piece of material, quality control, quality assurance measures shall be taken, and the equipment of personnel shall be in accordance with the stipulations in Article 72.
The equipment and personnel for the manufacture of Category Ι pressure vessels made by a whole piece of material shall meet the stipulations shown below except the chief designer, who shall apply to stipulations in Subparagraph 2 of paragraph 1 in Article 72:
1. Manufacturing and inspection equipment shall include: Digging equipment, hydraulic pressure testing instruments.
2. Principle of the construction shall meet one of the qualifications shown below:
(1) Graduating form departments relating to mechanics in colleges and or with qualifications of technicians for mechanics, and with over 1 year of experience in design, manufacture or inspection of machinery for type inspections.
(2) Graduating from departments relating to mechanics in vocational high schools and with over 2 years of experience in design, manufacture or inspection of machinery for type inspections.
(3) With over 5 years of experience in design, manufacture or inspection of machinery for type inspections.
3. The constructors shall have over 2 years of working experience in the field relating to digging.

Manufacturers of Category Ι pressure vessels manufactured by sealing shall apply for sealing inspection at local inspecting organization before the construction. However, this limitation shall not apply to those meeting any of the cases shown below:
1. Auxiliary equipment or those only sealing stress parts without stress under compression.
2. Those only sealing the parts shown below:
(1) Circumferential joints of pipes with inside diameter less than 300mm.
(2) Reinforcement materials, pipes, pipe table, flanges and valve bases etc. sealed on the body or the end plates.
(3) Sealing supporting racks or other objects withstanding no pressure on the body or the end plates.
(4) Leakproof sealing.
The sealing inspection items shall include material inspection, surface inspection, mechanical performance test for sealed parts, radiation inspection, heat treatment inspection and other necessary inspections.

When applying for sealing inspection of pressure vessel s, the Manufacturer shall fill the Application for Sealing Inspection of Pressure vessel s (Annex 32) and submit the documents shown below:
1. Material certificate 1 copy.
2. 2 copies of specification of sealing (Annex 32) and 1 copy of construction locations classification map.
3. 2 copies of detailed structure drawing and strength calculation sheet.
4. Sealing technician certificate of sealing constructors.
5. Qualification certificate for the type inspection of manufacturing facilities, sealing procedure and sealing procedure qualification examination records.

When carrying out the sealing inspection on Category Ι pressure vessels, the inspecting organization shall first examine the documents submitted by the Manufacturer, and the site inspection shall then be carried out after the documents are qualified.
When carrying out the site inspection, personnel designated by the Manufacture or the Manufacturer shall be on the scene and prepare the items shown below before the inspection：
1. Test pieces for mechanical performances.
2. Radiation inspection.

The inspecting organization shall stamp the qualification mark (annex 34) on the specification of Category Ι pressure vessels for Category Ι pressure vessels qualified in the completion test, after signed by the Inspector, 1 copy of the specification shall then be delivered to the applicant, and the qualification mark shall be printed, painted or posted at distinct part of the object inspected for identification.

Upon completion of the body of the Category Ι pressure vessel, the Manufacturer shall apply for structure inspection at local inspecting organization.However, for Category Ι pressure vessels separately assembled at the site of installation, the structure inspection shall be applied for at local inspecting organization before the installation.

To apply for the structure inspection of the category Ι pressure vessel , the Manufacturer shall fill up and submit an Application Form(Annex 35) for Structure Inspection of pressure vessels together with the following documents :
1. Two(2) copies of the specification(Annex 44) of the category Ι pressure vessel.
2. Two(2) copies each of the detailed structure drawings and the strength calculation sheets.
3. One(1) copy of the welding list with a stamp indicating the qualification status of the inspection of those manufactured by using welding method shall be attached.
4. One (1) copy of the certificate indicating qualification status of the type inspection of those manufactured by using riveting method shall be attached.
In case both the welding inspection and the structure inspection are carried out by the same Inspecting Organization, the documental requirements stated in above Items 2 and 3 may be exempted..
The coverage of the structure inspection mentioned in the preceding Paragraph 1shall includes inspection of the construction methods, the material thickness, the structure, the dimensions, the maximum operating pressure, the strength calculation review, and the arrangement of the manhole, the cleaning hole, and the safety devices, as well as the pressure test, and the materials used for the shell body, the end plate, the pipe sheet, the smoke tube, the fire chamber and the fire tube and etc., and other inspections as required.

When the inspecting organization carries out structure inspection on Category Ι pressure vessels, the Manufacture or personnel designated by the Manufacture shall be on the scene and prepare the items shown below.
1. Place the objects of inspection at locations convenient for inspection.
2. Prepare for pressure tests like hydraulic pressure test etc.

The inspecting organization shall stamp the qualification mark (annex 34) on the Detailed List of Category Ι pressure vessels for Category Ι pressure vessels qualified in the completion test or deemed qualified according to paragraph 3 of Article 13, after signed by the Inspector, 1 copy of the list shall then be delivered to the applicant, and the qualification mark shall be printed, painted or posted at distinct part of the object inspected for identification.

Upon completion of the installation of Category Ι pressure vessel , the employer shall apply for completion inspection at the inspecting organization; those not receiving the completion inspection shall not be used.
When the inspecting organization carries out structure inspection on pressure vessel s, the Manufacture or personnel designated by the Manufacture shall be on the scene

When applying for completion inspection of pressure vessels, the Manufacturer shall fill the Application for Completion Inspection of Category Ι pressure vessels (Annex 37) and submit the documents shown below:
1. Specification of the pressure vessel with seal of qualification mark for the structure inspection or reinspection.
2. Map for the installation site of the pressure vessel and peripheral situations
The Completion inspection of pressure vessel s shall include inspections on the quantity and capacity of safety valves, blowoff test, safety equipment quantity and dimensions of the pressure gauge and other necessary inspections.
The inspecting organization shall issue the Report for Results of Completion inspection of Pressure vessel s (Annex 45) and the Qualification Certificate (Annex 39) to Category Ι pressure vessel s qualified in the completion inspection, the max period of validity for the aforesaid documents shall be 1 year.

The employer shall fill the Application for Periodic Inspection of Category Ι pressure vessel s (Annex 40) 1 month before the expiry of the qualification certificate for the inspection of pressure vessel s and apply for periodic inspection at the inspecting organization.

The periodic inspection of the pressure vessel s shall be carried out more than one time per year, the external inspection shall be in accordance with the stipulations shown below:
1. More than 2 Category Ι pressure vessels connected with pipelines for continuous production procedure or Category Ι pressure vessels for generation shall be inspected more that once every 2 years.
2. Category Ι pressure vessels other than what stipulated in the previous subparagraph shall be inspected more that once a year.
For pressure vessel s for generation with generating capacity over 20,000kw, the external inspection as mentioned in the previous paragraph shall be extended and carried out along with the internal inspection. But its period cannot exceed 2 years.

If the internal inspection for the Category Ι pressure vessels shown below cannot be carried out, the employer shall submit documents including safety and health management status, auto inspection plans and implementation records, photocopy of the qualification specification for the structure inspection of the vessel, detailed structure drawing, production flow chart, emergent treatment plans, auto control system and proposal of substitutes at the inspecting organization for approval of extending the period of the internal inspection or substitution with other means of inspection:
1. Those free of manholes or cannot be equipped with manholes, leaning holes or inspection hole due to structural reasons.
2. Those with accelerant, molecular sieve or other special contents inside.
3. System equipment that cannot be separated during the continuous production procedure.
4. Others that have difficulty in internal inspection.
If the Category Ι pressure vessels mentioned in the previous paragraph are attached to boilers, the inspection period shall be extended accordingly.

After accepting the application for internal inspection, the inspecting organization shall notify the employer of the date for the completion inspection for Category Ι pressure vessels so that they can resume the inside of the Category Ι pressure vessels to the normal temperature and pressure, discharge the contents and carry out ventilation, air change, cleaning for the Category Ι pressure vessels s and prepare for other necessary proceedings for the periodic inspection.
The internal inspection mentioned in the previous paragraph shall include surface inspection of the Category Ι pressure vessels and nondestructive inspections for thickness, cracks, distortion and defilement of the Category Ι pressure vessels s, and determine the pressure test and other necessary inspections to be carried out according to the results of the aforesaid inspections.
Category Ι pressure vessels without corrosive contents that have difficulty in internal inspection shall receive pressure test with the pressure 1.5 times of the common pressure, the pressure test can also be carried out on the contents with the pressure over 1.1 times of the common pressure, and the air tight test and visual examination with the pressure above the common pressure shall be carried out as substitute.

The items of external inspection include visual examination, detection of the corrosion, cracks, distortion, defilement and leakage on the surface, if necessary, the non-destructive detection, ultrasonic thickness measurement as fixed points in corrodible areas, accessories and auxiliary devices inspection shall also be carried out. Whenever necessary, proper instruments shall be adopted to detect the inside of the Category Ι pressure vessels, if something abnormal is found, the internal inspection shall then be carried out.
The ultrasonic thickness measurement stipulated in the previous paragraph may be exempted if there're problems like high temperature etc. that leads to difficulty in the measurement
When carrying out the external inspection on Category Ι pressure vessels, the inspecting organization he shall notify the employer of the date of inspection. During the inspection, the Manufacture or personnel designated by the Manufacture shall be on the scene.

The inspecting organization shall sign on the original qualification certificate of Category Ι pressure vessels qualified in the periodic inspection and indicate the period of service (1 years at the most), but for paragraph 2 of Article 108, the period may be 2 years.
The Inspector shall fill the Report for the Result of Periodic Inspection for Category Ι pressure vessels (Annex 46) after the completion of the periodic inspection and notify the employer of the results.

If the Category Ι pressure vessel is deemed unqualified in the periodic inspection, the inspector shall record the disqualification in the record of the qualification certificate of the inspection and notify of the improvement; if the situation is serious and has the possibility of resulting in danger, if shall be reported to the inspection organization for limitation of its max pressure or prohibition of use.

In case any of the following situations exists, the Owner/Employer of the category Ι pressure vessel shall submit the Inspecting Organization a re-inspection application for the said category Ι pressure vessel:
1. The pressure vessel to be used is imported from foreign countries.
2. The pressure vessel to be installed or re-used, has been idle for over one(I) year since the last qualification date of its structure inspection, re-inspection, completion Inspection or periodic inspection of the said boiler., except for those approved by the Inspection Organization,
3. The pressure vessel to be re-used, has previously been banned by the Inspection Organization.
4. The fixed type category Ιpressure vessel to be re-installed, is relocated at a place different from its original location.
5. The maximum operation pressure is to be up-rated.
6. The category of the contents to be changed.
In case the equipment category of the categoryΙ pressure vessel is changed to be a specific equipment for high pressure gases resulting from the reason as per Item 6 of the preceding Paragraph 1, the said pressure vessel shall be inspected in compliance with requirements related ro the specific equipment for the high pressure gases.
For those imported pressure vessels which are documented by the proper corresponding inspection certificates, the Inspecting Organization may grant exemption from all or part of the inspection requirements as stipulated in this Article.

When applying for the reinspection of Category Ι pressure vessels, the owner or the employer shall fill the Application for reinspection of Category Ι pressure vessels (Annex 42) and submit the documents shown below:
1. 2 copies of specification of the Category Ι pressure vessel.
2. Detailed drawing of structure and calculation sheet, each 2 copies. However, those deemed unnecessary by the inspecting organization may be ignored.
3. Aforesaid certificates for qualification of inspections or their photocopies.
Stipulations of Paragraph 3 of Article 102 and Article 103 shall apply to the reinspection.

Once the category Ι pressure vessel has been qualified through the re-inspection process, the specification of the said boiler shall be stamped with a qualification mark(Annex 34) and signed by the inspector of the Inspection Organization.One(1) copy of the above-mentioned specification shall then be delivered to the applicant to serve as an evidence of the qualification status of the re-inspection, for use to proceed with the Completion Inspection. However, for those pressure vessel which have been either idle for over one(1) year after being qualified by the completion/periodic inspection, or prohibited from operation as respectively stipulated in Items 2 and 3 under Paragraph 1 of Article 114, if the said pressure vessels which either remain at their original locations or are relocated at other places in the shop, are qualified by the inspection, the Inspection Organization may add the date and result of the inspection as well as the operation expiration duration with one(1) year as a maximum, on the original qualification certificate.
For those imported category Ι pressure vesse, the qualification mark shall be stamped on the distinct portion of the same after being inspected for identification purpose.

If the alteration of the Category Ι pressure vessel results in alteration of the body, header, end plate, tamina tectalis or reinforcement support, the owner or the employer shall apply at the local inspecting organization for the alteration inspection.
The inspecting organization shall record the date of inspection, altered parts and results of the inspection on the original qualification certificate of the Category Ι pressure vessel for the Category Ι pressure vessels qualified in the completion test
If over 1/3 of the body or header of the Category Ι pressure vessel is to be altered or the end plate and pipe sheet are to be entirely altered, the alteration shall be carried out according to stipulations of Article 95.

When applying for the alteration inspection of Category Ι pressure vessels, the Manufacturer shall fill the Application for Alteration Inspection of Category Ι pressure vessels (Annex 43) and submit it the documents as shown below.
1. Qualification certificate of the type inspection of the manufacturing equipment.
2. 2 copies of specification of the Category Ι pressure vessel
3. Drawings of the altered parts.
4. Detailed structure drawing and strength calculation sheet, each 2 copies. However, this may be ignored if the inspecting organization deems it unnecessary.
5. Aforesaid certificates for qualification of inspections or their photocopies.
Stipulations of Paragraph 3 of Article 102 and Article 103 shall apply to the inspection.

When carrying out the structure inspection, completion inspection, periodic inspection, reinspection or alteration inspection, the inspecting organization, if considering necessary, shall notify the owner of the Category Ι pressure vessels and the employer or his/her agent of the measures shown below:
1. Remove all or part of the covering on the inspected object.
2. Pull out the rivet or pipe.
3. Drill holes on the plate or pipes.
4. Disassemble the heat exchanger.
5. Other proceedings considered necessary.
For subparagraph 3 of the previous paragraph, the applicant shall apply for non-destructive inspection and submit supporting documents.