- GB/T 12241, GB/T 12242 and GB/T 12243 are the main GB/T references buyers often mention for safety valves.
- GB quotations should confirm set pressure, rated capacity, spring range, material, marking, sealing and test reports.
- Export RFQs should translate GB requirements into clear English datasheets, certificates and inspection records.
- Official GB standard text should be checked through authorized standards channels before final compliance decisions.
››› GB Standards Overview
GB safety valve procurement usually combines product, test, material and project references
GB Safety Valve Standards is not one single document. In practical procurement, buyers may mention general safety valve requirements, performance test methods, spring-loaded valve requirements, cryogenic pilot valve requirements, pressure-temperature ratings, flange standards and project-specific inspection requirements.
For a supplier or EPC buyer, the important question is how the GB/T reference affects the valve quotation: model selection, set pressure, spring range, capacity confirmation, material certificate, pressure test, seat tightness test, nameplate, lead seal, delivery documents and export comparison with ASME, API, ISO or EN requirements.
What this page helps you confirm
- Which GB/T reference is likely related to your safety valve RFQ.
- How GB/T 12241, 12242, 12243 and 40011 connect to real valve procurement.
- Which documents should be requested before production and shipment.
- How to prepare export-friendly RFQ data for GB-manufactured safety valves.
- Which verified product, application and standards resources help complete final valve selection.
››› Core GB References
Key GB / GB/T references for safety valve RFQs
Use the references below to connect each GB/T number with quotation data, test expectations, material checks and documentation requirements. Exact standard status and scope should be checked against the official national standard record before final compliance decisions.
GB/T 12241-2021
Safety Valves — General Requirements
Officially listed as “Safety valves—General requirements”. Use it to frame terminology, design and production test expectations, type test language, discharge capacity confirmation, sizing basis, marking and lead-seal requirements for GB/T safety valve RFQs.
GB/T 12242-2021
Pressure Relief Devices Performance Test
Officially listed as “Pressure relief devices—Performance test code”. Use it when the RFQ needs performance test methods, opening and reseating pressure language, displacement or flow-coefficient testing records and test-medium clarification.
GB/T 12243-2021
Spring Loaded Safety Valves
Officially listed as “Spring loaded safety valves”. Use it for spring-loaded safety valve design, performance, inspection, marking, lead sealing, protection, storage and transportation requirements.
GB/T 40011-2021
Cryogenic Pilot Safety Valves
Officially listed as “Pilot safety valve for cryogenic fluid service”. Use it for LNG, LOX, LIN, LAr and cold-gas projects where pilot operation, low-temperature materials, seat leakage risk and documentation need special review.
GB/T 12224-2015
Industrial Steel Valve Requirements
Officially listed as “General requirements for industrial steel valves”. Use it when the safety valve has a steel pressure boundary and the buyer needs material, pressure-temperature or general steel valve requirements in GB/T language.
GB/T 19672-2021
Pipeline Valve Technical Specification
Officially listed as “Pipeline valves—Technical specification”. Use it only when a safety valve is supplied as part of a pipeline station, gas skid, valve station or broader pipeline package requiring Chinese pipeline-valve references.
››› Application Map
How GB safety valve standards connect to protected equipment
The standard reference should always be matched to the protected equipment, relief scenario and inspection deliverables. A GB/T number alone does not define the complete valve selection.
Pressure Vessels
For receivers, separators, accumulators, storage vessels and process vessels. Confirm MAWP, set pressure, capacity, medium, test reports, marking and lead seal requirements.
Boilers & Steam Systems
For steam drums, boiler outlets and steam headers. Confirm certified steam capacity, accumulation, blowdown, lifting lever, drainability and safe discharge.
Skid Systems
For packaged gas, hydrogen, oxygen, ammonia and process utility skids. Confirm tag list, P&ID, connection standard, vent route and export documents.
Storage Tanks
For LPG, LNG, ammonia, air, nitrogen, oxygen and process storage. Confirm fire case, emergency relief, multiple valves and discharge philosophy.
Compressors
For air, natural gas, hydrogen, oxygen, ammonia and process gas compressors. Confirm blocked discharge, vibration, pulsation and outlet reaction force.
Heat Exchangers
For steam heaters, vaporizers, condensers, evaporators and process exchangers. Confirm protected side, tube rupture, thermal expansion and two-phase risk.
››› Testing & Documentation
GB projects should be quoted with clear test and document deliverables
Many purchasing problems come from incomplete GB/T document requirements. A valve may meet the mechanical specification but still fail inspection if the buyer expected a different certificate, test record, marking language, pressure unit or nameplate format.
Before production, confirm whether the project needs Chinese-language certificates, English-language certificates, dual nameplate, inspection witness, third-party inspection, original MTC, set pressure calibration, pressure test, seat tightness test, special cleaning or export packaging.
Common GB RFQ document package
- Technical datasheet with tag number, model, size, set pressure, connection, material and service.
- Sizing calculation or certified relieving capacity confirmation where required.
- Material certificates for body, bonnet, nozzle, disc, trim, spring and pressure-retaining parts.
- Set pressure calibration certificate, pressure test report and seat tightness test report.
- Marking, sealing, nameplate, lead seal and serial number requirements.
- General arrangement drawing with inlet/outlet size, weight, dimensions and discharge orientation.
- Special cleaning, oxygen-clean, cryogenic, sour service or low-temperature records where specified.
››› RFQ Checklist
Information to send when your project specifies GB or GB/T
Complete RFQ data helps match GB/T requirements with the actual operating case, connection standard, material and inspection documents.
- Protected equipment: boiler, vessel, pipeline, skid, tank, compressor, heat exchanger or receiver.
- Applicable reference: GB/T 12241, GB/T 12242, GB/T 12243, GB/T 40011, project standard or international comparison standard.
- Design pressure / MAWP, set pressure, operating pressure, relieving temperature and operating temperature.
- Medium name, phase, density or molecular weight and special risk such as steam, gas, liquid, two-phase, cryogenic, oxygen, hydrogen or ammonia.
- Required relieving capacity, sizing basis and governing relief scenario.
- Connection details: DN, PN/Class, flange standard, threaded connection, inlet/outlet orientation and mating flange requirement.
- Back pressure, discharge route, vent stack, flare, recovery header, drain or safe disposal philosophy.
- Required documents: datasheet, drawing, MTC, set pressure certificate, pressure test, seat test, marking and inspection witness.
››› Practical Cases
GB safety valve cases buyers commonly ask about
These examples show how GB/T requirements normally appear in real procurement language. Final selection still requires verified sizing, protected equipment data and applicable standard review.
Case 1: GB/T 12243 Spring-Loaded Safety Valve for a Receiver
Protected equipment: air receiver, nitrogen receiver, separator or process vessel. Common checks include GB/T 12243 reference, set pressure, spring range, material, seat tightness, pressure test, marking, sealing and calibration certificate.
Case 2: GB/T 12242 Performance Test Documentation
Protected equipment: pressure vessel, steam header or process skid. Common buyer request: performance test basis, discharge capacity confirmation, test record, pressure setting and document traceability.
SHOP-FLOOR VERIFICATION
From Code Requirement to Shop-Floor Verification
Standards define technical requirements, but purchase-order compliance depends on design, materials, inspection scope and recorded test results. This actual ZOBAI photograph documents pressure-test control panel and safety valve technician. It is facility evidence, not a substitute for project-specific certificates or an agreed inspection and test plan.
Case 3: GB Safety Valve for Boiler and Steam Service
Protected equipment: boiler drum, steam generator or main steam header. Key data: steam condition, set pressure, rated capacity, blowdown, lifting lever, drainability, outlet force and safe venting.
Case 4: GB/T 40011 Cryogenic Pilot Safety Valve
Protected equipment: LNG, LOX, LIN, LAr or cold gas system. Key data: cryogenic temperature, set pressure, back pressure, low-temperature material, pilot system, insulation clearance and cold discharge route.
Case 5: Export Replacement Valve for a Chinese-Made Skid
Protected equipment: imported or Chinese-built process skid. Common issue: buyer has DN, PN and set pressure but no capacity basis. Correct review should still confirm medium, capacity, temperature, flange standard and documents.
Case 6: GB/T and International Standard Comparison RFQ
Protected equipment: overseas project using Chinese-manufactured safety valves. Common requirement: compare GB/T documentation with ASME, API, ISO or EN expectations before purchase approval.
››› Related Standards & Selection Pages
Continue your GB safety valve standards review
Use these pages to connect GB/T standard requirements with international references, valve sizing, equipment applications and final RFQ preparation.
Safety Valve Standards Guide
Review the main standards hub before comparing GB/T requirements with ASME, DIN/EN, ISO and API references.
ASME Safety Valve Standards
Compare GB/T requirements with ASME references used for boilers, pressure vessels and piping projects.
DIN / EN Safety Valve Standards
Compare GB/T requirements with DIN/EN and PED references used in European pressure equipment projects.
ISO 4126 Safety Valve Standards
Use the ISO 4126 guide to compare international safety valve terminology, capacity and performance expectations.
API 520 Safety Valve Sizing
Use API 520 when the RFQ needs relief sizing logic, capacity basis or international PSV calculation language.
API 527 Seat Tightness Test
Use API 527 when the buyer specifies leakage or seat tightness acceptance for pressure relief valves.
Safety Valve Sizing
Use the sizing guide to confirm capacity, medium, pressure, temperature and relief scenario before model selection.
Spring Loaded Safety Valves
Review the verified spring-loaded safety valve product page for model selection and RFQ preparation.
LNG & Cryogenic Applications
Review LNG and cryogenic application requirements before selecting a pilot-operated or spring-loaded safety valve for low-temperature service. Confirm medium, temperature, materials, icing risk, discharge route and documentation.
››› FAQ
GB Safety Valve Standards FAQ
Short answers for common RFQ and procurement questions related to GB / GB/T safety valve requirements.
Is GB Safety Valve Standards one single standard?
No. GB safety valve procurement usually uses several GB/T references. GB/T 12241 covers general safety valve requirements, GB/T 12242 covers performance test methods, GB/T 12243 covers spring-loaded safety valves and GB/T 40011 covers pilot safety valves for cryogenic fluid service.
Which GB/T standard is most relevant for spring-loaded safety valves?
GB/T 12243 is commonly referenced for spring-loaded safety valves. Final procurement still needs set pressure, capacity, medium, temperature, material, connection and documentation requirements.
What documents should I request for a GB safety valve RFQ?
Typical documents include datasheet, general arrangement drawing, material certificates, sizing or capacity confirmation, set pressure calibration certificate, pressure test report, seat tightness test report, marking and packing records.
Can GB safety valves be used for export projects?
They can be considered when the buyer accepts GB/T references or when the valve is supplied as part of a Chinese-manufactured skid. For international projects, compare GB/T documents with ASME, API, ISO, EN or project-specific requirements before approval.
What RFQ data is needed before selecting a GB safety valve?
Provide protected equipment, MAWP, set pressure, medium, phase, relieving temperature, required capacity, relief scenario, connection standard, back pressure, discharge route, material requirement and required documents.