Before manufacturing or revising 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 special equipment for high-pressure gases 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.
Quality control and assurance measures, equipment and personnel of the type inspection as stipulated in Paragraph 1 shall apply to stipulations in Article 96, and the inspecting organization shall issue the Qualification Certificate of Type Inspection for Manufacturing Equipment (Annex 2) for qualifiers in the type inspection.
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.

Manufacturers of special equipment for high-pressure gases 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, and 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 special equipment for high-pressure gases, 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 following items 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 special equipment for high-pressure gases for special equipment for high-pressure gases 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 including the towers and the tanks etc. of the special equipment for producing high-pressure gases, the Manufacturer shall apply for structure inspection at local inspecting organization.However, for special equipment for high-pressure gases 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 special equipment for high-pressure gases, the Manufacturer shall fill up and submit an Application Form(Annex 35) for Structure Inspection of the special equipment for high-pressure gases together with the following documents :
1. Two (2) copies of the specification(Annex 44) of special equipment for high-pressure gases.
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 1 shall include inspection of construction methods, material thickness, structure, dimensions, maximum operating pressure, strength calculation review, and arrangement of manhole, cleaning hole, and safety devices, as well as pressure test, adiabatic performance test for the super-low temperature equipment, and materials used for shell body, end plate, pipe sheet and etc., and other inspections as required.
The adiabatic performance test for the super-low temperature equipment required in the preceding paragraph may be recognized by referring to the supporting evidences relevant to the adiabatic performance of the said equipment.

When the inspecting organization carries out structure inspection on special equipment for high-pressure gases, 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 special equipment for high-pressure gases for special equipment for high-pressure gases 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 the 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

To apply for the Completion Inspection of special equipment for high-pressure gases, the Manufacturer shall fill up and submit an Application Form(Annex 37) for Completion Inspection of the special equipment for high-pressure gases together with the following documents:
1. A specification of the special equipment for high-pressure gases with a stamp thereon to evidence their qualification status of the structure inspection or the re-inspection.
2. An area drawing showing the installation site and the surroundings of the said special equipment for high-pressure gases.
The coverage of the Completion Inspection mentioned in the preceding Paragraph shall include inspections of the quantity and capacity of safety valves, blow-down test, safety devices, pressure indicating devices and other inspections as required.
Once the special equipment has been qualified through the re-inspection process, the Inspecting Organization shall issue a report sheet(Annex 45) to depict the results of the Completion Inspection, and a qualification certificate(Annex 39) with a maximum operation duration of one(1) year.

The employer shall fill the Application for Periodic Inspection of Pressure vessels (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.
If any defect is found in the external inspection mentioned in the previous paragraph, the inspecting organization shall, if deeming it necessary, carry out the internal inspection.
Internal inspection of special equipment for high-pressure gases shall be carried out according to the following table:
┌─────┬───────────┬────────────┐
│Equipment │Materials To Be Used │Period │
│Type │ │ │
├─────┼───────────┼────────────┤
│ │1. Austenite stainless│15 years │
│ │ steel │ │
│ │2. Aluminum │ │
│ ├───────────┼────────────┤
│Storage │Nickel steel (2.5 ~ 9 │10 years │
│tank │% ) │ │
│ ├───────────┼────────────┤
│ │Materials equivalent │8 years (for │
│ │to carbon steel plate │low-temperature tank │
│ │for low-temperature │only) │
│ │vessels with tensile ├────────────┤
│ │strength less than │2 years after completion│
│ │58kg/mm2. │Inspection for the first│
│ │ │inspection; 5 years for │
│ │ │the succeeding │
│ │ │inspections. │
│ ├───────────┼────────────┤
│ │Materials equivalent │2 years after completion│
│ │to rolled structure │inspection for the first│
│ │steel for boilers and │inspection; 5 years for │
│ │welded construction │the succeeding │
│ │with tensile strength │inspections. │
│ │less than 58kg/mm2 . │ │
│ ├───────────┼────────────┤
│ │High tensile steel │2 years after completion│
│ │(carbon steel with │inspection for the first│
│ │minimum tensile │inspection; 5 years for │
│ │strength above │the succeeding │
│ │58kg/mm2 )receiving │inspections. │
│ │annealing in the │ │
│ │furnace after welding.│ │
│ ├───────────┼────────────┤
│ │1. High tensile steel │2 years after completion│
│ │ receiving anneal in│inspection for the first│
│ │ the furnace after │inspection; 3 years for │
│ │ welding, not │the succeeding │
│ │ receiving annealing│inspections. │
│ │ in the furnace │ │
│ │ after being │ │
│ │ modified or fixed │ │
│ │ by welding ( │ │
│ │ including welding │ │
│ │ reparation, │ │
│ │ excluding for minor│ │
│ │ repairingt). │ │
│ │2. Other materials. │ │
├─────┼───────────┼────────────┤
│Special │Other materials that │3 years. │
│Equipment │have no concern of │ │
│for High │corrosion and │ │
│Pressure │deterioration. │ │
│Gases ├───────────┼────────────┤
│except for│Other materials │2 years after the │
│Storage │ │completion inspection │
│Tank │ │for the first │
│ │ │inspection; 3 years for │
│ │ │the succeeding │
│ │ │inspections. │
├─────┴───────────┴────────────┤
│Remarks: │
│1.Special equipment for high-pressure gases shall adopt │
│ proper materials according to conditions of usage. │
│2.For storage tanks of low-temperature or ultra-low │
│ temperature high-pressure gases like double-shell │
│ structure, septum type and low-temperature evaporators │
│ that have difficulty in internal inspection, if adopting │
│ non-destructive detection for determination of cracks, │
│ damages and corrosion, the detection shall be carried out │
│ at the pressure 1.5 times of the common pressure for the │
│ pressure test or 1.1 times of the common pressure for │
│ pressure test on the contents in the vessels, and the air │
│ tight test and visual examination with the pressure above │
│ the common pressure shall be carried out as substitute. │
│3.For other than storage tanks that have difficulty in │
│ internal inspection due to size and structure, if │
│ non-destructive inspection and opening inspection │
│ eternally or open inspection on equipment connected with │
│ the special equipment for high-pressure gases with the │
│ same conditions may be confirmed, these inspection can be │
│ carried out as substitutes. │
│4.If the materials used have obvious corrosion or cracks, │
│ the aforesaid period shall be shortened according to │
│ actual situation. │
│5.Special equipment for high-pressure gases shall not be │
│ limited by the period of open inspection, and the visual │
│ examination and air tight tests etc. shall be carried out │
│ every year to determine if there's something abnormal. │
│6.Those called "slight" mean those applicable to "sealing │
│ reparation not requiring limits and conditions for heat │
│ treatment", the period shall be the same to that of the │
│ anneal carried out for elimination of stress in the │
│ furnace after sealing. │
└──────────────────────────────┘

If the internal inspection for the special equipment for high-pressure gases 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. Cold boxes, flat low-temperature tanks, oxygen tanks, liquid nitrogen tanks, liquid argon tanks, low-temperature evaporators and other low-temperature or ultra-low-temperature equipment for high-pressure gases.
3. Those with accelerant, molecular sieve or other special contents inside.
4. System equipment that cannot be separated during the continuous production procedure.
5. Diaphragm type tanks or non-corrosive equipment.
6. Others that have difficulty in internal inspection.
If the special equipment for high-pressure gases mentioned in the previous paragraph are attached to Category Ι pressure vessels or 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 special equipment for high-pressure gases so that they can resume the inside of the special equipment for high-pressure gases to the normal temperature and pressure, discharge the contents and carry out ventilation, air change, cleaning for the special equipment for high-pressure gases and prepare for other necessary proceedings for the periodic inspection.
The internal inspection mentioned in the previous paragraph shall include surface inspection of the special equipment for high-pressure gases and nondestructive inspections for thickness, cracks, distortion and defilement of the special equipment for high-pressure vessels, and determine the pressure test and other necessary inspections to be carried out according to the results of the aforesaid inspections.

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 special equipment for high-pressure gases, 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 equipped with integrated heat preservation materials jacket type or having problems like high temperature etc. that leads to difficulty in the measurement
When carrying out the external inspection on special equipment for high-pressure gases, 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 special equipment for high-pressure gases qualified in the periodic inspection and indicate the period of service (1 years at the most).
The Inspector shall fill the Report for the Result of Periodic Inspection for Special Equipment for High-Pressure Gases (Annex 46) after the completion of the periodic inspection and notify the employer of the results.

If the special equipment for high-pressure gases 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 special equipment for high-pressure gases shall submit the Inspecting Organization a re-inspection application for the said special equipment:
1. The special equipment to be used is imported from foreign countries.
2. The special equipment to be installed or re-used, has been idle for over one (1) year since the last qualification date of its structure inspection, re-inspection, completion inspection or periodic inspection of said vessel. However, this requirement may be exempted subject to the Inspection Organization's acceptance.
3. The pressure vessel to be re-used, has previously been banned by the Inspection Organization.
4 . To relocate and re-install a special equipment at a place different from its original location.
5. To up-rate the maximum operation pressure.
6. To change the category of the contents.
For those imported special equipment 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 special equipment for high-pressure gases, the owner or the employer shall fill the Application for reinspection of special equipment for high-pressure gases (Annex 42) and submit the documents shown below:
1. 2 copies of specification of the special equipment for high-pressure gases.
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 126 and Article 127 shall apply to the reinspection.

Once the special equipment for high-pressure gases has been qualified through the re-inspection process, the specification of the said special equipment 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 special equipment 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 138, if the said special equipment which either remain at their original locations or are relocated at other places in the factory, are qualified by the inspection, the Inspecting 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 the special equipment for high-pressure gases, the qualification mark shall be stamped on the distinct portion of the same after being inspected for identification purpose.

If the alteration of the special equipment for high-pressure gases results in alteration of the towers or tanks, body, end plate, tamina tectalis, pipe sheet, header 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 special equipment for high-pressure gases for the special equipment for high-pressure gases qualified in the completion test
If over 1/3 of the towers or tanks, body or header of the special equipment for high-pressure gases 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 120.

When applying for the alteration inspection of special equipment for high-pressure gases, the Manufacturer shall fill the Application for Alteration Inspection of special equipment for high-pressure gases (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 special equipment for high-pressure gases.
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 126 and Article 127 shall apply to the inspection.

When considering necessary before carrying out the construction inspection, completion inspection, periodic inspection, reinspection or alteration inspection, the inspecting organization may request the Owner, Employer or their designated agent to 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. Other proceedings considered necessary.
For subparagraph 3 of the previous paragraph, the applicant shall apply for non-destructive inspection and submit supporting documents.