BAIJIAN - Third party testing organization
This standard specifies the dimensions、 appearance、 weight、 technical requirements、 test methods、 inspection rules、 packaging、 marking、 and quality certificate of seamless steel pipes for gas cylinders and accumulator shells. This standard is applicable to the manufacture of seamless steel pipes for gas cylinders and accumulator shells 2 Normative References: The clauses in the following documents become the clauses of this standard through reference in this standard. For dated reference documents、 all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. Therefore、 parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references、 the latest version applies to this standard. GB/T 222 Permissible deviations in the chemical composition of finished products of steel GB/T 223.5- Determination of acid soluble silicon and total silicon content in steel and alloys - Reduced molybdosilicate spectrophotometric method GB/T 223.11 Determination of chromium content in steel and alloys - Visual titration or potentiometric titration method GB/T 223.12 Method for chemical analysis of steel and alloys - Sodium carbonate separation diphenylcarbamide photometric method - Determination of chromium content GB/T 223.14 Method for chemical analysis of steel and alloys、 but reagent extraction spectrophotometric method Vanadium Content GB/T 223.17 Methods for Chemical Analysis of Iron、 Steel、 and Alloy - Determination of Titanium Content - Diantipyrylmethane Photometric Method - GB/T 223.19 Methods for Chemical Analysis of Iron、 Steel、 and Alloy - Determination of Copper - Neocuproin Trichloromethane Extraction Photometric Method - GB/T 223.24 Methods for Chemical Analysis of Iron、 Steel、 and Alloy - Extraction Separation - Dimethylglyoxime Photometric Method - Determination of Nickel Content - GB/T 223.26- Determination of Molybdenum Content in Iron、 Steel、 and Alloy - Thiocyanate Photometric Method - GB/T 223.30 Method for the Determination of Nickel Content in Iron、 Steel、 and Alloy GB/T 223.40 by Bromo Amygdalic Acid Precipitation Separation Azo swelling III Spectrophotometer GB/T 223.40 Determination of Chromium Content in Iron、 Steel、 and Alloy GB/T 223.53 Chlorosulfophenol S Spectrophotometer Method for Chemical Analysis of Iron、 Steel、 and Alloy GB/T 223.54 Flame Atomic Absorption Spectrophotometer Method for Chemical Analysis of Iron、 Steel、 and Alloy GB/T 223.54 Determination of Nickel Content by Dun Flame Atomic Absorption Spectrophotometer GB/T 223.59 Determination of Phosphorus Content in Iron、 Steel、 and Alloy GB/T 223.59 Phosphorus Molybdenum Blue Spectrophotometer Method for Chemical Analysis of Iron、 Steel、 and Alloy GB/T 223.60 Determination of Silicon Content by Perchlorate Dehydration Gravimetric Method GB/T 223.62 Method for Chemical Analysis of Iron、 Steel、 and Alloy - Butyl Acetate Extraction Photometric Method for the Determination of Phosphorus Content GB/T 223.63 Method for Chemical Analysis of Iron、 Steel、 and Alloy - Sodium (Potassium) Periodate Photometric Determination of Manganese Content GB/T 223.64- Determination of Manganese Content in Iron、 Steel、 and Alloy - Flame Atomic Absorption Spectrometric Method GB/T 223.68- Chemical Analysis of Iron、 Steel、 and Alloy - Potassium Iodate Titration Method for Determination of Sulfur Content after Combustion in a Tubular Furnace GB/T 223.69- Determination of Carbon Content in Iron、 Steel、 and Alloy - Gas Capacity Method after Combustion in a Tubular Furnace GB/T 223.76: Chemical Analysis of Iron、 Steel、 and Alloy - Determination of Vanadium Content - Flame Atomic Absorption Spectrometric Method GB/T 223.78- Chemistry of Iron、 Steel、 and Alloy Analysis Method: Curcumin Direct Photometric Determination of Boron Content GB/T 228-2002 Metallic Materials - Room Temperature Tensile Test Method (eqv ISO 68921998) GB/T 229-1994 Metallic Charpy Notch Impact Test Method (eqv ISO 1481983& ISO 831976) GB/T 241-2007 Metallic Pipe Hydraulic Test Method GB/T 2102-2006 Acceptance and Packaging of Steel Pipe、 Marks and Quality Certificates GB/T 2975-1998 Steel and Steel Products、 Mechanical Property Testing、 Sampling Locations and Sample Preparation (eqv ISO 3771997) GB/T 4336-2002 Spark Source Atomic Emission Spectrometric Analysis of Carbon and Medium and Low Alloy Steels (Conventional Method)
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific、 fair、 and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsinspection and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered、 meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing、 with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle、 low cost、 and attentive service 7. Possess authoritative qualifications such as CMA、 CNAS、 CAL、 etc 8. The testing report is authoritative and effective、 and is generally used in China