Delivering Representative LNG Samples with Confidence and Compliance
From a vaporizing system to intermittent system, Welker LNG solutions keep cryogenic samples representative, analyzer-ready, and aligned with industry standards for custody transfer and quality assurance.
Trusted LNG Sampling Expertise
Welker systems preserve composition from extraction through vaporization and regulation, delivering a homogeneous gas sample to your analyzer while minimizing fractionation and loss of heavy components
- Engineered for Representation: Check valve probe, heated regulation, and accumulation to stabilize phase and protect light ends.
- Standards Aligned: Designed in accordance with API 14.1, GPA 2166, ISO 8943, and API 17.10.2 for LNG sampling and analysis.
- Cryogenic-Ready Construction: 316/316L stainless steel, hazardous-area classification options, and enclosure integration for field reliability.
Analyzer-Ready Peformance
- Vaporization and temperature control to analyzer setpoints
- First- and second-stage pressure regulation (HR-4SS & IR-4) for stable delivery
- Optional spot and composite collection with SC Single Cavity Cylinders or CP-2 Constant Pressure Cylinders
- Preloading and purging procedures to reduce cross-contamination
LNG Systems & Configurations
Choose the configuration that matches your measurement program—each solution can be customized to your site, analyzer, and compliance requirements.
Vaporizing System
Clean, conditioned gas for continuous analysis—complete vaporization, temperature control, and pressure regulation to protect composition through delivery.
- Ensures complete and uniform vaporization
- Accurate temperature and pressure control
- Compliance with industry standards
Vaporizing & Spot Sampling System
Run your analyzer continuously while capturing discrete, representative spot samples in SC Single Cavity Cylinders for verification and lab analysis.
- Ensures complete and uniform vaporization
- Accurate temperature and pressure control
- Compliance with industry standards
- Quick-connects and secure brackets for safe handling of Welker single cavity cylinders
Intermittent System
Collect a time-weighted composite that represents the entire transfer—ideal for custody transfer, audits, and disputes.
- Ensures complete and uniform vaporization
Accurate temperature and pressure control
Compliance with industry standards - Programmable sampling intervals ensure consistent, repeatable sample collection
- Equipped with the best constant pressure cylinder on the market
Core Components
Engineered components that form the backbone of reliable, representative sampling programs.
LNG Sample Probe
Reduces line pack and helps prevent heavy-component fallback—improving response time and accuracy
Circulation Heater & Accumulator
Ensures full vaporization and mixing for a homogeneous analyzer feed
Regulators
Heated first-stage and stable second-stage regulation deliver analyzer-ready pressure and temperature
Cylinders
Built to industry standards, Welker cylinders maintain sample integrity and deliver reliable, representative results for LNG quality and custody transfer
Let's Design Your LNG Sampling System
Share your process conditions and compliance needs—Welker will tailor a representative, standards-aligned solution.