GB/T 25151.6-2014 English PDF

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GB/T 25151.6-2014: Fabrication and inspection method for high pressure urea equipment -- Part 6: Helium leakage test method for urea high pressure equipment
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 25151.6-2014	189	Add to Cart	3 days	Fabrication and inspection method for high pressure urea equipment -- Part 6: Helium leakage test method for urea high pressure equipment	Valid

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Basic data

Standard ID: GB/T 25151.6-2014 (GB/T25151.6-2014)
Description (Translated English): Fabrication and inspection method for high pressure urea equipment -- Part 6: Helium leakage test method for urea high pressure equipment
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G93
Classification of International Standard: 71.120.10; 75.180.20; 23.020.30
Word Count Estimation: 8,855
Date of Issue: 12/12/2014
Date of Implementation: 10/1/2015
Quoted Standard: GB 150.4; GB/T 9842; GB/T 9843; GB/T 10476; GB/T 12604.7; HG/T 2952; JB/T 4730.5
Regulation (derived from): National Standards Bulletin 2014 No. 30
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This Standard specifies the helium leak test method of welded joints of high voltage equipment, tube to tube sheet welding joints with or without penetrating defects. This Standard is applicable to a helium leak test urea synthesis column, stripper Co2 ur

GB/T 25151.6-2014: Fabrication and inspection method for high pressure urea equipment -- Part 6: Helium leakage test method for urea high pressure equipment

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Fabrication and inspection method for high pressure urea equipment Part 6.. Helium leakage test method for urea high pressure equipment ICS 71.120.10; 75.180.20; 23.020.30 G93 National Standards of People's Republic of China Urea manufacturing high pressure equipment inspection methods Part 6. Urea helium leak test methods for high-voltage equipment Part 6. Heliumleakagetestmethodforureahighpressureequipment Issued on. 2014-12-22 2015-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 25151 "high pressure urea equipment manufacturing test method" is divided into six parts. --- Part 1. Stainless steel with pole automatic surfacing ultrasonic testing; --- Part 2. Urea grade ultra-low carbon chromium-nickel-molybdenum austenitic stainless steel selective corrosion inspection and metallographic examination; --- Part 3. Urea grade ultra-low carbon chromium-nickel-molybdenum austenitic stainless steel to intergranular corrosion tendency test; --- Part 4. urea grade ultra-low carbon chromium-nickel-molybdenum austenitic stainless steel to intergranular corrosion tendency test specimens prepared to take; --- Part 5. High-voltage devices urea ammonia leak test methods; --- Part 6. High-voltage devices urea helium leak test methods. This section GB/T 25151 Part 6. This section drafted in accordance with GB/T 1.1-2009 given rules. This part is proposed by the China Petroleum and Chemical Industry Association. This part of the National Chemical Machinery and Equipment Standardization Technical Committee (SAC/TC429) centralized. This section drafted by. China Petrochemical Group Nanjing Chemical Industry Co., Ltd. Chemical Machinery Plant. The main drafters of this section. Yao Jiang, Han Bing, Jiang Baohua. Urea manufacturing high pressure equipment inspection methods Part 6. Urea helium leak test methods for high-voltage equipment

1 Scope

This section GB/T 25151 specifies the urea plant in the backing layer of welded joints urea high pressure equipment, tube to tube sheet welding tags Helium leak test methods for head Have penetration defects. This section applies to the urea synthesis column, stripper CO2 urea, urea, high-pressure washer, urea, urea and other high-pressure condenser high-voltage equipment Helium leak test. Helium leak test other chemical equipment may be performed with reference to this section.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB 150.4 Pressure Vessels Part 4. fabrication, inspection and acceptance GB/T 9842 urea reactor technical conditions GB/T 9843 urea high pressure scrubber technical conditions GB/T 10476 technical conditions of urea high-pressure condenser GB/T 12604.7 Terminology for nondestructive testing Leak Detection HG/T 2952 urea carbon dioxide stripper technical conditions JB/T 4730.5 Non-destructive testing of pressure equipments - Part 5. penetrant testing

3 Terms and Definitions

Terms and definitions GB/T 12604.7 defined apply to this document. The first four test preparation 4.1 backing layer and the inner member tube to tube sheet welding joints shall be visually examined after all the welding, the weld surface quality should meet GB 150.4 and GB/T 9842, GB/T 9843, GB/T 10476, HG/T 2952 requirements. After the completion of the high-pressure equipment manufacturing 4.2 Urea pressure test should be carried out, and then backing layer welded joints, weld tube to tube plate joints 100% penetration testing. Penetrant testing shall comply with JB/T 4730.5 of. Helium leak test 4.3 urea high pressure equipment should pressure test after passing the detection and penetration. Prior to 4.4 were Urea high pressure helium leak test equipment, first filled with 5 × 10-2MPa dry air or nitrogen, do tightness test to exclude Pipe leak detection, pressure gauge fittings, valves, and welded joint backing layer tube to tube sheet welding joints and other large leaks. All welded joints and tube to tube sheet welding joint surfaces should be cleaned on both sides and 4.5 equipment backing layer, there should be no oil Grease, dust, water, colored reagent residues, etc., to keep the surface of the subject site dry and clean. ......

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