GAS COMPRESSOR UNITS
Screw, centrifugal, and reciprocating gas compressor packages for petrochemical, natural gas processing, refrigeration, and industrial gas applications. Flow rates from 1,200 to 600,000 Nm³/h, discharge pressures up to 16.0 MPa, fully packaged from our ~38,000 m² workshop in Zhangjiagang, China.
APPLICATIONS
Gas compressor packages engineered for continuous-duty industrial and energy-sector services.
PETROCHEMICAL PROCESSING
Process gas compression for chemical production, polymer plants, and refinery off-gas services. Screw and centrifugal configurations matched to duty conditions.
NATURAL GAS PROCESSING
Gas gathering, pipeline boosting, and gas treatment plant compression. Variable suction conditions handled via capacity control systems.
REFRIGERATION SYSTEMS
Ammonia, propylene, and mixed-refrigerant compression for industrial cooling, cold storage, and process refrigeration loops.
INDUSTRIAL GAS PRODUCTION
Nitrogen, oxygen, hydrogen, CO&sub2;, and specialty gas compression for air separation units, chemical synthesis, and gas distribution.
LNG / BOG HANDLING
Boil-off gas re-compression at LNG terminals, FSRU facilities, and cryogenic storage installations. Low-temperature design with API 618/619 compliance.
VAPOR RECOVERY & FLARE GAS
Recovering vapors from storage, loading, and transfer operations. Reducing emissions and capturing valuable hydrocarbons to meet environmental regulations.
ENGINEERING STANDARDS
- API 618 / API 619 / ISO 10440
- ASME BPVC Section VIII (U-Stamp)
- PED 2014/68/EU (CE Marking)
- API 614 / API 670 (Lube & Monitoring)
- ATEX / IECEx (Hazardous Area)
- ISO 9001:2015 Quality System
- DNV / BV / LR / ABS Classification
PACKAGE SCOPE
Complete skid-mounted gas compressor packages — all interface points defined at project kickoff.
- Gas compressor (screw, centrifugal, or reciprocating per application)
- Electric motor driver (IE3/IE4, ATEX-rated where specified)
- Suction scrubber / knock-out drum (ASME VIII)
- Gas aftercooler and intercooler (shell-and-tube or plate-fin)
- Lube oil system with cooler, filters, and reservoir (API 614)
- Oil separation system with coalescing elements (<3 ppm carryover)
- PLC control panel (Siemens S7 / Allen-Bradley) with HMI
- Vibration monitoring and machinery protection (API 670)
- Safety relief valves and blowdown system (API 520/521)
- Common structural baseframe with anti-vibration mounts
- Complete piping, valves, instrumentation, and wiring on skid
- Full Vendor Data Book, FAT records, and EPC documentation
KEY SPECIFICATIONS
Typical operating envelope across compressor types.
| Parameter | Value |
|---|---|
| Flow range | 1,200 – 600,000 Nm³/h |
| Discharge pressure | 0.12 – 16.0 MPa |
| Driver power | 75 – 2,000 kW |
| Isentropic efficiency | ≥ 85% |
| Reliability | 99.5% |
| Compressor types | Screw / Centrifugal / Reciprocating |
| Noise (with enclosure) | ≤ 85 dB(A) |
PROJECT REFERENCES
Representative gas compressor projects delivered with full EPC documentation and third-party inspection.
| Client / Project | Location | Scope | Standards |
|---|---|---|---|
| Petrochemical Complex — Process Gas Compression | China | 2× screw compressor packages, ASME VIII vessels, Zone 1 electrical, full VDB | API 619, ASME VIII, ATEX |
| Gas Processing Plant — Pipeline Boosting | Middle East | Centrifugal compressor package, PED CE marking, European TPI | API 617, PED, IECEx |
| LNG Terminal — BOG Re-compression | Southeast Asia | Reciprocating compressor package for boil-off gas, cryogenic design | API 618, ASME VIII, DNV |
| Industrial Gas Plant — N&sub2; / O&sub2; Compression | China | Multi-stage reciprocating compressor, air separation unit service | API 618, ASME VIII, ISO 9001 |
FREQUENTLY ASKED QUESTIONS
Common questions from EPC engineers and procurement teams about gas compressor units
What types of gas compressors do you supply?
Lmart supplies three main compressor types as complete packaged units: oil-injected screw compressors (API 619) for moderate-flow, moderate-pressure duty; centrifugal compressors (API 617) for high-flow applications up to 600,000 Nm³/h; and reciprocating compressors (API 618) for high-pressure services up to 16.0 MPa. Each type is selected based on the gas composition, flow rate, pressure ratio, and process requirements defined in the project specification.
What gas services and applications are supported?
Our gas compressor packages serve petrochemical process gas, natural gas gathering and pipeline boosting, fuel gas boosting, flash gas and vapor recovery, LNG boil-off gas re-compression, industrial gases (nitrogen, oxygen, hydrogen, CO&sub2;), and refrigerant compression (ammonia, propylene, mixed refrigerants). We engineer each package for the specific gas composition, molecular weight, and operating conditions provided in the client’s process datasheet.
What certifications and standards do the packages meet?
Compressor packages are designed to API 617, API 618, or API 619 depending on type. Pressure-containing components are manufactured under ASME BPVC Section VIII (U-Stamp) or PED 2014/68/EU (CE marking). Electrical systems comply with ATEX or IECEx for hazardous area classification. Our facility holds ISO 9001:2015 certification and supports third-party inspection by DNV, BV, Lloyd’s, TÜV, and client-appointed inspectors.
What is the typical capacity and pressure range?
Our gas compressor packages cover flow rates from 1,200 to 600,000 Nm³/h and discharge pressures from 0.12 to 16.0 MPa. Driver power ranges from 75 to 2,000 kW. Screw compressors typically handle flows up to 10,000 m³/h at pressures to 4.5 MPa, centrifugal compressors serve high-volume applications, and reciprocating units address high-pressure requirements. Isentropic efficiency is ≥ 85% with 99.5% reliability.
What is included in the package scope?
Each skid-mounted package includes the compressor, electric motor driver, suction scrubber/knockout drum, gas aftercooler and intercooler, lube oil system (API 614), oil separation with coalescing elements (<3 ppm carryover), PLC control panel with HMI, vibration monitoring (API 670), safety relief valves (API 520/521), anti-vibration baseframe, and all on-skid piping, valves, and wiring. A complete Vendor Data Book with FAT records is delivered.
What is the lead time for a gas compressor package?
Standard gas compressor packages are delivered in 14–20 weeks from order confirmation. Custom-engineered packages with full EPC documentation, hazardous-area electrical, and third-party inspection typically require 20–28 weeks. All pressure vessels and heat exchangers are manufactured in-house at our ~38,000 m² Zhangjiagang facility, eliminating sub-vendor coordination delays. A detailed milestone schedule with hold/witness points is issued at kickoff.
REQUEST A QUOTATION
Share your process datasheet or specifications — our engineers will provide a technical proposal within 48 hours.