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GB 50461-2008: Code for quality acceptance of static equipment installation in petrochemical engineering
GB 50461-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC
P GB 50461-2008
Code for Construction Quality Inspection and Acceptance
Specification of Petrochemical Static Equipment Installation
ISSUED ON: NOVEMBER 12, 2008
IMPLEMENTED ON: MAY 1, 2009
Issued by: Ministry of Housing and Urban-Rural Construction of the People’s
Republic of China;
General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China.
Table of Contents
Foreword ... 4
1 General Provision ... 8
2 Terms ... 9
3 Basic Requirements ... 10
3.1 Qualification Requirements... 10
3.2 Counting Devices ... 10
3.3 Supervision and Inspection for Pressure Vessel Installation Work ... 10
3.4 Technical Documents of Equipment Installation ... 10
3.5 Uncasing Inspection for Equipment ... 11
3.6 Validation and Designation of Installing and Measuring Basis of the Equipment ... 12
3.7 Protection for Finished Product and Semi-manufactured Goods ... 13
4 Equipment Installation ... 14
4.1 Foundation Repetition Measurement and Treatment ... 14
4.2 Anchor Bolts ... 18
4.3 Sizing Blocks ... 18
4.4 General Rules of Installation ... 19
4.5 Grouting ... 22
4.6 Installation of Internal Components ... 23
4.7 Installation of Safety Accessories ... 23
4.8 Installation of Platform and Ladder ... 23
4.9 Cleaning, Liquidating and Sealing ... 24
5 On-site Welding for Equipment ... 27
5.1 General Requirements ... 27
5.2 Inspection of Assembling Component ... 28
5.3 Assembling ... 37
5.4 Welding ... 41
5.5 Heat Treatment ... 43
5.6 Shape Dimension and Appearance Inspection of Soldered Joint ... 45
5.7 Nondestructive Testing ... 47
5.8 The Overall Shape and Dimensional Inspection of Equipment ... 50
6 Test ... 52
6.1 General Requirements ... 52
6.2 Hydraulic Test ... 54
6.3 Gas Pressure Test ... 55
6.4 Airtight Test ... 55
6.5 Water filling leak-off-test or kerosene leak-off-test ... 56
7 Project Completions ... 57
Appendix A Flat Sizing Block and Skew Sizing Block ... 59
Appendix B The Quality Standard of Structure Installation of Air Cooled Exchanger ... 61
Appendix C The Quality Standard of Internal Component Installation of Tower Type Equipment
... 62
1 General Provision
1.0.1 This code is formulated with a view to strengthen the quality control of petrochemical
construction work, unify the requirements of installation work construction acceptance for
petrochemical static equipment (hereinafter referred to as “equipment”) and guarantee the
quality for equipment installation.
1.0.2 This code is applicable to the construction quality inspection and acceptance for
equipment installation of petrochemical construction work integral installation equipment and
on-site welding equipment and their special internal components, safety accessories, adjunctive
ladder and platform of equipment.
This code is not applicable to the construction quality inspection and acceptance for vertical
type cylindrical tank, gas tank and nonmetal equipment.
1.0.3 Overall inspection is required for all articles except the ones which are indicated with
the inspection quantity in this code.
1.0.4 Not only the requirements stipulated in this standard, but also those in the current
relevant ones of the nation shall be complied with for the construction quality inspection and
acceptance for the equipment installation.
3 Basic Requirements
3.1 Qualification Requirements
3.1.1 The construction organizations that are employed in equipment installation, on-site
welding and nondestructive testing works shall be staffed with the corresponding professionals
who are competent for the works they are in charge with.
Check method: Check the enterprise qualification certificate.
3.1.2 The staff who is employed in equipment welding and nondestructive inspection work
shall take the examination according to the current national standard and provision
requirements and obtain the relevant certificates, and the competent staff can be employed in
the works which are corresponding to their qualifications.
Check method: Check the staff’s qualification certificate.
3.2 Counting Devices
3.2.1 The counting device shall be calibrated, adjusted or verified, and in the qualified state,
the device also shall be used in the effective and determining period.
Check method: Check the test marks of the counting device.
3.2.2 When the cycle certified counting device is transferred, the calibrating/adjusting
certificate shall be required.
Check method: Check the verification certificate of the counting device.
3.3 Supervision and Inspection for Pressure Vessel Installation Work
3.3.1 As for the pressure vessel on-site welding and installation work, the employed
construction organization shall notify the local special equipment safety supervisory
department for inspection in writing before commencement.
Check method: Check “the Special Equipment On-site Welding and Installation Notice”.
3.3.2 As for the pressure vessel on-site welding and installation work, the employed
construction organization shall accept the supervision and inspection from the inspection and
detection organization which takes the qualification on the work place.
Check method: Check “The Installation Quality Certificate of Boiler Pressure Vessel”,
and “Safety Performance Supervision Testing Certificate for Boiler Pressure Vessel
Products”.
3.4 Technical Documents of Equipment Installation
3.4.1 The equipment installation shall be equipped with the following technical documents:
1 After pickling and passivating and it is washed, the 0.01% methyl orange extract
solution shall be dropped on the equipment surface which is pickled and passivated, it is
eligible that no redness appears.
2 The inspection of passivating film shall be carried out on the test panel which is
carried out the surface-treatment under the same conditions, dissolve 10g red prussiate of
potash into 500mL water, add 10mL concentrated sulfuric acid and 20mL concentrated
hydrochloric acid, dilute it to 1000mL and make it act as test solution, then drop it on the
washed surface, it is eligible that no deep-blue appears in 0.5 ~ 1min.
Check method: Visual check.
4.9.2 As for the austenitic stainless steel equipment, the chloride ion content in flashing
water shall not be more than 25mg/L.
Check method: Check the report of chloride ion content in water.
4.9.3 The equipment degreasing quality check method and approval standard shall meet the
following requirements:
1 Direct method:
1) Wipe the in-wall and internal components for the equipment in clean and dry
white-filter paper, the Lipin shall not be on the paper.
2) In the UV-lamp whose wavelength is 320~380nm, the hyacinthine fluorescence
shall not be on the degreasing surface.
2 Indirect method:
1) When steam is used to blow and clean the degreasing, a little steam condensate
shall be filled in the vessel, and some pure camphor whose granularity is less than
1mm shall be pulled into the vessel, it is eligible that camphor keep gyrating.
2) When the organic solvent or aqua fortis is used for degreasing, the solution or
acid which has been degreased shall be took away for analyzing the oleaginous or
organic matter contents, their contents shall not be more than 0.03%.
4.9.4 The ware trace or alkali trace must not be on the aluminium equipment after the
chemical cleaning.
Check method: Visual check.
4.9.5 A...