Before manufacturing or modifying vessels for high-pressure gases, the Manufacturer shall fill up the type inspection application form (Annex 31) and submit the same along with the documents listed below tothe local inspecting organization:
1. Type, detailed structure drawings and strength calculation sheet for the vessel for high-pressure gases applying for inspection.
2. Type, capacity and quantity of the manufacturing and inspection equipment.
3. Brief description ofeducational background and working experience of the chief designer.
4. Brief description of educational background and working experience of the construction director.
5. Qualification requirements and number of constructors.
6. Qualification certificate of the welders, specification of welding procedures and qualification records of the welding procedures.
Any alteration of the equipment stipulated 2 or change of personnel stipulated in Items 3 and 4 of the preceding 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 modification shall prohibited from implementationt without passing the inspection. However, this shall not apply to the case where the types and conditions that have already passed the type inspection.

For the manufacturing of vessels for high-pressure gases, quality control, quality assurance measures shall be taken, and the equipment of personnel shall be in accordance with the stipulations as shown below except those apply to Article 96.
1. Seamless vessel:
(1) Forging or molding devices.
(2) Those manufactured by connecting the bottoms: bottom-connecting devices.
(3) Those made of heat processed materials: Anneal and temperature measurement devices that can measure the internal temperature of the anneal.
(4) Washing devices.
(5) Thickness confirming instruments.
2. Vessels other than the seamless vessels, , shall be equipped with the necessary devices required for use in manufacture of the vessels according to the stipulations as shown below, besides those mentioned in preceding Items 3 through5:
(1) Forming devices.
(2) Welding or hard brazing devices.
(3) Anti-corrosiont coating equipment. But this shall not apply to the case when using stainless steel, aluminum alloy or non-corrosive materials for manufacturing vessels used for containing liquefied petroleum gas.

Manufacturers of vessels 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 weldingg 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) welding supporting racks or other objects withstanding no pressure on the body or the end plates.
(4) Leakproof welding.
The welding inspection items shall include material inspection, surface inspection, mechanical performance test for welded parts, radiation inspection, heat treatment inspection and other necessary inspections.

When applying for welding inspection of pressure vessel s, the Manufacturer shall fill up the Application Form for Welding Inspection of Pressure vessel s (Annex 32) and submit the documents shown below:
1. One (1) copy of Material certificate.
2. Two (2) copies of specification of welding (Annex 33) and one (1) copy of construction locations classification map.
3. Two (2) copies of detailed structure drawing and strength calculation sheet.
4. Welding technician certificate of sealing constructors.
5. One (1) cope each of the qualification certificate for the type inspection of manufacturing facilities, welding procedure and welding procedure qualification examination records.

The welding inspection of vessels for high-pressure gases, shall be carried out at site in accordance with the required inspection items after the documents submitted bythe Manufacturer have been successfully examined by the inspecting organization.
When carrying out the site inspection, the Manufacturer or the personnel designated by the Manufacture shall be present on the scene in body and prepare the itemsshown below ahead of time before the inspection：
1. Test pieces used for testing mechanical performances.
2. Readiness for performing radiation inspection.

After being qualified by the welding inspection, the welding specification for the vessels for high-pressure gases shall be stamped with the qualification mark (annex 34) and signed by the Inspector thereon. s The inspecting organization shall then deliver one ( 1 ) copy of the welding specification to the applicant. The qualification mark shall be printed, painted or posted at distinct locationt of the inspected for identification.

Upon completion of the body of the vessel for high-pressure gases, the Upon completion of the vessels for high pressure gages, the Manufacturer shall apply for construction inspection at the local inspecting organization.

When applying for the construction inspection of vessels for high-pressure gases, the Manufacturer shall fill up the Application Form for Construction Inspection pressure vessels (Annex 35) and submit the same along withthe documents as shown below:
1. Two (2) copies of specification of the vessel for high-pressure gases (Annex 44)
2. Two (2) copies each of the detailed construction drawings and strength calculation sheets.
3. Welding check list of the welding inspection, stamped with inspection qualification mark thereon for those manufactured by welding method.
4. Qualification certificate of the type inspection for those manufactured by riveting method.
In case the welding inspection and the construction inspection are to be carried out by the same inspecting organization, the documents listed under Items 2 and 3 in the preceding Paragraph may be exempted for submittal.
The construction inspection stipulated in preceding Paragraph 1 consists of construction methods, material thickness, structure, dimensions, maximum operating pressure, strength calculation review as well as air tight test, pressure test, safety devices, accessory parts and devices, as well as adiabatic performance test of the ultra-low-temperature equipment andother inspections as required.

When the inspecting organization is carrying out the construction inspection of the vessels for high-pressure gases, the Manufacture or the personnel designated by the Manufacture shall be on the scene in body and prepare the items shown below in advance:
1. To place the objects of inspection at the location convenient for inspection.
2. To prepare for pressure tests including the hydraulic pressure test.

The inspecting organization shall issue the qualification certification for the inspection (Annex 39, 39-1) and stamp the qualification mark (annex 34) on the Detailed List of vessels for high-pressure gases for vessels for high-pressure gases qualified in the structure test, 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.
However, the qualification certificate for vessels for high-pressure gases mounted on vehicles shall be issued after they are assembled and fixed on the chassis. The period of validation for the qualification certificate of inspection mentioned in the previous subparagraph shall be in accordance with the stipulations in Article 155.

The employer shall fill the Application for Periodic Inspection of Vessels for high-pressure gases (Annex 40) 1 month before the expiry of the qualification certificate for the inspection of vessles for high-pressure gases and apply for periodic inspection at the inspecting organization.

The periodic inspection of the vessels for high-pressure gases shall be performed both internally and externally in accordance with the stipulations as shown below:
1. Internal inspection:
(1) Shall be performed once per five (5) years for those having been qualified by the structure inspection for not exceeding fifteen (15) years elapsed from the approval date of the said inspection; while once per two (2) years for those qualified for more than fifteen(15) years but not exceeding twenty (20) years; and once per year for those qualified for more than twenty (20) years.
(2) Shall be performed once per five (5) years for those seamless high pressure vessels.
2. External inspection:
(1) Shall be performed once per year for high-pressure vessels mounted on vehicles.
(2) Shall be performed once per five(5) years for those seamless high pressure vessels not mounted on vehicles.
(3) The inspection frequency for those high pressure vessels which do not fall within the categories as specified in the above Sub-items(1) and(2) shall be performed in accordance with the requirements as stipulated in the preceding Paragraph 1.
In case, for those imported vessels for high pressure gases, which have not performed the structure inspection, their manufactured date shall be used as the starting date to count the time duration stated in the preceding Paragraph 1.

If the internal inspection for the following vessels for high-pressure gases cannot be carried out, the Employer shall submit the documents ( including the safety and health management status, the self- inspection plans and their implementation records, detailed condtruction drawing, emergent reponse plans, safety protection devices and the proposal of alternative inspection methods ) to the inspecting organization three (3) months ahead of time before the expiration date of the qualification certificate of inspection for approval in forms of either by extending the time limit of the internal inspection, or by substituting with other means of inspection:
1. Those are free of manholes or cannot be equipped with manholes, cleaning holes or inspection holes either according to related stipulations, or due to restriction from constructional reasons.
2. Vessels used for low-temperature or ultra-low-temperature high-pressure gases.
3. Vessels of Jacket type or others with no concern of corrosion.
4. Other vessels that have difficulty in performing internal inspection.

To proceed with the internal inspection after receipt of the application for periodic inspection, the inspecting organization shall notify the Employer of the inspection date so to allow for recovering the inside of the special equipment for high-pressure gases to the normal temperature and pressure status, by discharging their contents, as well as carrying out ventilation, air change, cleaning works and other required preparation tasks for the periodic inspection.

The coverage of the external inspection of the vessels for high pressure gases shall include the visual examination, detection of the external corrosion, cracks, distortion, dirty and leakage, as well as the necessary non-destructive examination and the ultrasonic measurement of thickness at the specific areas vulnerable to corrosion, as required. Whenever any abnormal phenomenon is found, an internal inspection shall be carried out subsequently.
The coverage of the internal inspection of the vessels for high pressure gases shall include surface inspection, detection of thickness, corrosion, cracks, distortion, dirty and etc., as well as the necessary non-destructive examination whose results will serve as a basis to justify the necessity for performing the pressure test and other inspections, as required.
As an alternative, the internal inspection of the vessels for high pressure low-temperature or super-low temperature gases may be replaced by applying a pressure test either at a pressure of above 1.5 times the normal pressure, or above 1.1 times of the normal pressure with contents in the vessels, and followed by an air tight test at a pressure above the normal pressure, as well as a visual examination and etc..
To proceed with the necessary inspection of vessels for high-pressure gases as specified in the preceding Paragraph 2, those welded vessels shall receive an examination of their anti-corrosive coatings; while those pressure vessels for super-low temperature gases shall go through an air tight test.
The requirements for the ultrasonic measurement of thickness stipulated in the preceding Paragraph 1 may be exempted, provided that the existence of the one piece /jacket type insulations or super low temperature and etc.leads to a real difficulty in carrying out the said thickness measurement.
In process of performing the internal/ external inspection of the vessels for high-pressure gases, as required, the Inspecting Organization shall notify the employer of the inspection date.The Employer or his designated personnel shall be present in person at the job site in the course of inspection.
With respect to those imported vessels for high pressure gages, which are documented with qualified certificates issued by foreign countries, the Inspection Organization may consider exempting all or part of the requirements of inspection as stipulated in the preceding six(6) paragraphs based on the adequacy of the contents of the inspection previously performed.

After the vessels for high-pressure gases have been qualified by the periodic inspection in compliance with the requirements as stipulated in the preceding Article 155, the original qualification certificate of said vessels shall be signed and indicated thereon an extended operation duration with five(5) years as the maximum by the Inspecting Organization. Nevertheless, an new qualification certificate shall be re-issued for those tanked type vessels which are fixed on the vehicles.
Having completed the periodic inspection of the vessels for high pressure gases as per the preceding Paragraph 1, the Inspector shall fill up a periodic inspection report(Annex 46) to file the results of said periodic inspection, and notify the same to the Employer.

If the vessel of 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 vessels for high pressure gases shall submit the Inspecting Organization an application for re-inspection:
1. The vessel to be used is imported from foreign countries.
2. The vessel to be installed or re-used, has been idle for over one (1) year since the last qualification date of the structure inspection, re-inspection, completion inspection or periodic inspection of said vessel. However,the above requirements may be exempted for those vessels approved by the Inspection Organization.
3. The vessel intended to be re-used, has previously been prohibited by the Inspection Organization.
4. The maximum bottling pressure is intended to be up-rated.
5. The category of the bottled gases is intended to be changed.
For those imported vessels which are documented by proper supporting inspection certificates, the Inspecting Organization may grant a full or partial exemption from the 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 up the Application Form for Re-inspection of Vessels of High-Pressure Gases (Annex 42) and submit the documents shown below:
1. Two (2) copies of specification of the vessels of high-pressure gases.
2. Two (2) copies eachof the detailed drawings of structure and calculation sheets. However, those documents to be deemed unnecessary by the inspecting organization may be exempted.
3. Original certificates for qualification of inspections or their photocopies.
The requirements Stipulated in Paragraph 3 of Articles 151 and 152 shall apply mutatis mutandis to the re-inspection.

The inspection organization shall issue the qualification certificate for the special equipment for high-pressure gases, which have been qualified by re-inspection, and remark the operation validity date thereon accordingly. But for those qualified special equipment categorized under Items 2 or 3 of Article 160, the inspection date, inspection results and the extended operation validity date may be remarked on their original qualification certificate instead.
The requirements stipulated in Article 155 apply mutatis mutandis to the validity time limit with the maximum duration of five (5) years.
For those imported vessels 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 there is any change to the construction of the vessel for high-pressure gases, the Owner or the Employer shall submit an application for alteration inspection to the inspection organization.
The Inspector shall remark the date of inspection, altered components 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, which have been qualified by the alteration test.

When applying for the alteration inspection of vessel of high-pressure gases, the Manufacturer shall fill up the Application Form for Alteration Inspection of Vessel of High-Pressure Gases (Annex 43) and submit the documents as shown below.
1. Qualification certificate of the type inspection of the manufacturing equipment.
2. 2 copies of specification of the vessel of high-pressure gases.
3. Drawings of the altered parts.
4. Two (2) copies each of the detailed structure drawing and strength calculation sheets,. However, this requirement may be exempted if the inspecting organization deems it unnecessary.
5. Original certificates for qualification of inspections or their photocopies.
Stipulations of Paragraph 3 of Articles 151 and 152 shall apply mutatis mutandis to the inspection.