Sampling Cylinders: Technical Overview

Sampling cylinders (also called sample bombs or sample bottles) are pressure-rated stainless steel containers used to collect, transport, and store representative samples of process fluids from refineries, chemical plants, and natural gas facilities. They are the critical interface between the closed loop sampling panel and the laboratory — preserving the sample's composition, pressure, and temperature from extraction through analysis.

Wanan manufactures two primary cylinder types: standard sampling cylinders with double-end needle valves for stable liquids and gases, and constant-pressure (piston) cylinders with an internal spring-loaded piston for volatile liquids where maintaining process pressure is essential to prevent light-end vaporization. Both types are manufactured from 316L stainless steel with full material traceability.

Key Technical Specifications

ParameterStandard CylinderPiston (Constant-Pressure)
Volume150 mL - 4 L300 mL - 1 L
Design Pressure10 - 30 MPa (1,500 - 4,500 PSI)10 - 20 MPa
Material316L SS seamless tube316L SS + PTFE piston seal
Valve TypeDouble-end needle valveDouble-end needle valve + vent
CertificationASME, DOT, TPED, GB 5099ASME, DOT, TPED
Hydrostatic Test1.5x design pressure1.5x design pressure

Applications

  • Refinery Sampling: Crude oil, naphtha, gasoline, diesel, LPG, jet fuel
  • Petrochemical: Ethylene, propylene, aromatics, solvents, intermediates
  • Natural Gas: Natural gas liquids, condensate, pressurized gas samples
  • Lab Analysis: GC/MS sampling, RVP testing, distillation, sulfur analysis

Customized Steel Cylinder

Customized Steel Cylinder

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Customized Steel Cylinder - Customized Steel Cylinder | Wanan Technology
Customized Steel Cylinder - Customized Steel Cylinder | Wanan Technology

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FAQ

A closed loop sampler is a safety device used to collect liquid samples from pipelines or storage tanks without exposing operators to hazardous chemicals. Wanan closed loop samplers comply with API MPMS 8.2 standard and feature a sealed design that returns purge fluid back to the process, eliminating VOC emissions.

Wanan flame arrestors are certified to ISO 16852, ATEX (European Explosive Atmospheres Directive), and EN 12874 standards. We provide type test reports for IIA, IIB, and IIC gas groups. All products are manufactured in our ISO 9001:2015 certified facilities.

Yes. Wanan Technology is a registered qualified supplier for Sinopec, PetroChina, CNOOC (China), ExxonMobil, LukOil (Russia), ENI (Italy), KazMunayGas (Kazakhstan), and PDVSA (Venezuela), among others.

Wanan Technology has manufacturing facilities in Germany, USA, and China. We also have inventory and sales service centers in UAE to serve Middle East and global customers with fast delivery.

Wan’an Technology’s closed sampler is suitable for liquid sampling scenarios involving toxic and hazardous media in petrochemical, natural gas, oil refinery, and tank farm industries. It complies with API MPMS 8.2 standards, prevents operators from coming into contact with hazardous substances, and meets HSE environmental emission requirements.

A: Standard products ship within 2-4 weeks from order confirmation. Custom-engineered solutions typically require 6-8 weeks depending on specification complexity. For urgent projects, we offer expedited production upon request — contact our sales team with your timeline and we will work out a schedule.

A: Our products comply with major international standards including ISO 3170 (petroleum sampling), API MPMS 8.1/8.2, ATEX for explosive atmospheres, ASME, and EAC. DOT and TPED certifications are available for sample cylinders. We provide full certification documentation and material test certificates with every order.

A: Yes. We offer sample units for evaluation purposes. Upon approval, we ship one or two units so you can verify compatibility with your application, materials, and site conditions before committing to a volume order. Shipping costs may apply depending on destination.