Liquid Nitrogen-Free Ammonia Sampling Cylinder by PULL
| Brand | PULL |
|---|---|
| Origin | Shaanxi, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | PULL-1000mL |
| Rated Working Pressure | 4 MPa |
| Capacity | 1000 mL |
| Material | Stainless Steel (316 SS typical for anhydrous ammonia service) |
| Compliance | GB 8570–2008 “Sampling of Laboratory Samples of Anhydrous Liquid Ammonia” |
Overview
The PULL-1000mL Liquid Anhydrous Ammonia Sampling Cylinder is a pressure-rated, stainless steel sampling vessel engineered specifically for the safe, representative, and contamination-free collection and transport of liquid-phase anhydrous ammonia (NH₃) in petroleum refining, fertilizer production, chemical manufacturing, and industrial hygiene laboratories. Designed in strict accordance with GB 8570–2008 — the Chinese national standard governing laboratory sampling procedures for anhydrous liquid ammonia — this cylinder operates under a maximum allowable working pressure (MAWP) of 4 MPa (580 psi), ensuring structural integrity during pressurized filling, storage, and transfer operations. Its seamless 316 stainless steel construction provides exceptional resistance to stress corrosion cracking (SCC), pitting, and general corrosion induced by high-purity, water-free NH₃ — a critical requirement for maintaining sample fidelity and operator safety. Unlike generic gas cylinders, this device integrates process-compatible valve geometry, low-outgassing internal finish, and traceable material certification to support analytical workflows requiring ISO/IEC 17025-compliant sample integrity.
Key Features
- Pressure-rated 1000 mL capacity cylinder fabricated from ASTM A240 Grade 316 stainless steel, certified for anhydrous ammonia service per NACE MR0175/ISO 15156
- Maximum allowable working pressure (MAWP): 4 MPa at 50 °C — validated via hydrostatic test at 1.5× MAWP and stamped with permanent test mark
- Double-seal, diaphragm-type isolation valve with PTFE-faced seat and stainless steel stem — ensures zero leakage and minimal dead volume
- Electropolished interior surface (Ra ≤ 0.4 µm) to reduce adsorption and residual carryover between samples
- Integrated pressure relief device (PRD) compliant with ISO 4126-1, set at 4.5 MPa ± 0.2 MPa
- Threaded CGA 660 or DIN 477 No. 13 inlet/outlet port configuration — compatible with standard ammonia charging manifolds and analytical interfaces
- Traceable serial number, material test report (MTR), and conformity declaration supplied with each unit
Sample Compatibility & Compliance
This sampling cylinder is exclusively intended for liquid-phase anhydrous ammonia (≥99.9% purity, water content < 30 ppm). It is not suitable for aqueous ammonia solutions, ammonium hydroxide, or mixed-phase systems. The design satisfies mandatory requirements of GB 8570–2008, including pre-conditioning protocols, fill ratio limits (≤80% liquid volume at 20 °C), and post-sampling valve closure sequence. For international regulatory alignment, the cylinder’s mechanical design follows ASME BPVC Section VIII, Division 1 principles; its material selection conforms to ISO 15156-3 for sour service environments. When used within a documented sampling SOP, it supports data integrity under GLP and GMP frameworks, particularly where ammonia purity testing feeds into ASTM D2028, ISO 8573-1 (gas purity), or IECQ QC 080000 hazardous substance control processes.
Software & Data Management
As a passive, non-electronic sampling device, the PULL-1000mL cylinder does not incorporate embedded firmware, sensors, or connectivity. However, it is fully compatible with digital sample chain-of-custody (CoC) platforms used in petrochemical QA/QC labs. Each unit’s unique serial number can be scanned and logged into LIMS systems (e.g., LabWare, Thermo Fisher SampleManager) to associate physical samples with analytical batches, instrument runs, and audit trails. Optional QR-code label engraving (available upon request) enables automated CoC entry and reduces manual transcription errors. All supporting documentation — MTR, hydrotest certificate, GB 8570 conformance statement — is provided in English and digitally archived for FDA 21 CFR Part 11–aligned record retention.
Applications
- Quality control sampling upstream of ammonia synthesis converters in Haber-Bosch plants
- Batch release testing of commercial-grade anhydrous ammonia per GB/T 536 or ISO 8573-8
- Contaminant screening (e.g., oil, moisture, metal ions) in refrigeration-grade NH₃ circuits
- Calibration gas preparation for FTIR, GC-TCD, or chemiluminescence NH₃ analyzers
- Environmental monitoring of ammonia emissions from storage terminals and railcar offloading points
- Research-scale reaction studies requiring precisely metered, phase-stable NH₃ feedstock
FAQ
Is this cylinder certified for transport under UN/DOT or ADR regulations?
No — the PULL-1000mL is designed solely for laboratory sampling and short-term storage. Transport requires UN-certified packaging (e.g., UN 2073 specification cylinders) and compliance with ADR/RID Chapter 3.3.
What is the recommended cleaning protocol between uses?
Rinse three times with ultra-high-purity nitrogen gas, followed by vacuum evacuation to ≤10 Pa for ≥30 minutes. Avoid solvents or water, which may induce corrosion or residue formation.
Can this cylinder be used for liquefied petroleum gas (LPG) or chlorine?
No — material compatibility and pressure rating are specific to anhydrous ammonia. Use only with media explicitly listed in the user manual and GB 8570 scope.
Does the cylinder include a pressure gauge or temperature sensor?
No — it is a passive vessel. Pressure monitoring must be performed externally using calibrated gauges installed in the sampling manifold.
What documentation accompanies shipment?
Each unit ships with a Certificate of Conformity to GB 8570–2008, Material Test Report (ASTM A240), Hydrostatic Test Certificate, and bilingual (English/Chinese) operating instructions.
