Sepmem

What Sepmem does

Sepmem (成都赛普瑞兴科技有限公司) is a Chengdu-headquartered industrial engineering firm founded in 2003 that delivers natural gas processing, gas separation, and LNG production solutions primarily to Chinese state-owned oil and gas majors, coal chemical enterprises, and clean energy logistics operators. The company operates through three interlocking lines of business: (1) full-scope Engineering, Procurement, Construction and Commissioning (EPCC) of natural gas processing and LNG facilities; (2) commissioned processing (代加工), where Sepmem installs and operates complete LNG/CNG processing equipment at customer sites, charging processing fees while the customer supplies raw gas and receives finished products — a structure that eliminates customer capex and operational risk; and (3) direct LNG/CNG product sales through company-owned and joint-venture refueling stations in Xinjiang, complemented by a tanker truck distribution fleet.

The company's technical core is a proprietary technology stack covering the full natural gas processing chain. It holds 90+ patents spanning HP-Amine™ amine-based desulfurization and decarbonization (H₂S/CO₂ purity as low as 1 ppm across 50,000–20,000,000 Nm³/d scale), Pressure Swing Adsorption with purity up to 99.999%, membrane separation (50+ units deployed, recovery rates up to 99%), cryogenic separation below −40 °C, mixed refrigerant liquefaction (C1–C5 hydrocarbons + N₂) reaching −162 °C LNG temperatures, plate-fin air coolers delivering 60%+ energy savings, large temperature difference circulating water cooling with 70%+ energy reduction, and unmanned containerized LNG units capable of 4-hour LNG production, one-button shutdown, and 3-day relocation. Six named invention/utility model patents are registered, and the technology is delivered under both proprietary brands (HP-Amine™, Unattended LNG Container Unit) and customer-engineered packages.

Sepmem's revenue mechanics combine one-time EPC project milestone recognition, recurring per-unit processing fees under commissioned processing contracts (e.g., PetroChina Jilin 10万方/天, Sinopec Northwest 20万方/天, Jilin Kunlun tolling), and volume-based LNG/CNG fuel sales from company-operated stations. The customer base includes PetroChina, Sinopec, CNOOC, Shenhua, China Coal, Baosteel (as JV partner), CNPC Coalbed Methane, and international reference projects in Indonesia and Vietnam. The company is privately held with no disclosed external funding, founder-led under Chairman Zhang Jingtao (张惊涛) and General Manager Yang Ying (杨鹰), and operates eight production bases across Xinjiang, Sichuan, Gansu, and Jilin with total assets of 1.5 billion RMB (2023) and a workforce of 200+ technical staff sourced primarily from 985/211 universities.

Name

Sepmem

Legal name

成都赛普瑞兴科技有限公司

Website

https://sepmem.com

Company type

Private

Founded year

2003

Operating status

Operating

Headcount range

101–250 employees

Short description

Sepmem (成都赛普瑞兴科技有限公司) is a Chengdu-headquartered industrial engineering firm providing natural gas processing, gas separation, and LNG technologies for China's oil and gas, coal chemical, and clean energy sectors through turnkey EPC, commissioned processing, and direct LNG/CNG sales.

Ownership category

akta.pro rank

Product category

Natural Gas Processing Engineering & LNG Production

NAICS

Industrial Gas Manufacturing (32512), Natural Gas Extraction (21113), Pump and Compressor Manufacturing (33391)

SIC

Refrigeration & Service Industry Machinery (3580), Crude Petroleum & Natural Gas (1311), Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564)

akta.pro primary industry

Gas Processing Plant Equipment & Skids (Separators, Heat Exchangers, Turboexpanders) (EUAAABAH)

akta.pro secondary industries

Field Treating & Separation (Heater Treaters, Separators, LACT) (EUALACAI), Natural Gas Compression Services (EUAAACAC)

Keywords

• Natural gas processing
• Gas separation technology
• LNG liquefaction engineering
• Scattered gas recovery
• Clean energy production

Headquarters

HQ city

Chengdu

HQ country

China

HQ region

Asia

Offices8 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Infrastructure, Operations, Marketing or Sales, Supply Chain

Revenue model

1. Engineering, Procurement, Construction & Commissioning (EPCC/EPC): Provides full project cycle services including engineering design, equipment procurement, construction, and commissioning for natural gas processing, gas separation, and LNG facilities. Revenue recognized per project milestone. Key project types include PSA hydrogen recovery, membrane separation, MDEA decarbonization, LNG liquefaction, and TEG dehydration units.
2. LNG/ CNG Commissioned Processing Services (代加工服务): Provides turnkey natural gas processing equipment and manages full production operations. Customers supply raw gas and receive finished LNG/CNG products while paying processing fees. Equipment can be transferred to customer after an operating period. Enables zero customer investment and zero operational risk.
3. LNG/CNG Product Sales (Clean Energy): Sells LNG and CNG products directly through company-owned and joint-venture refueling stations and logistics fleet supply. Revenue from volume-based fuel sales. Includes investment in LNG/CNG station construction and operation.
4. Chemical Engineering Design Services: Provides chemical engineering design, process packages, feasibility studies, HAZOP/LOPA analysis, SIS design, safety diagnostics, and EPCM management for chemical, environmental, and energy engineering projects across inorganic, organic, and environmental engineering sectors.

Go-to-market motion2 records

Distribution channels4 records

Marketing channels4 records

Core offering

Sepmem provides engineering, procurement, construction, and commissioning (EPCC) services for natural gas processing and liquefaction facilities, specializing in scattered, wellhead, and associated gas recovery. The company manufactures proprietary gas separation equipment (PSA, membrane, cryogenic), purification systems (HP-Amine™ desulfurization, TEG dehydration), and modular LNG plants, and also operates its own LNG production plants and refueling stations through subsidiaries in western China.

Product overview

Sepmem (成都赛普瑞兴科技有限公司) is an industrial engineering company specializing in natural gas processing and clean energy solutions. The company operates two main business segments: engineering services and energy investment/production. The engineering segment offers core gas processing technologies including Natural Gas Liquefaction (MRC, modular, and containerized technologies), Natural Gas Purification (HP-Amine™ desulfurization/decarbonization, TEG dehydration), Light Hydrocarbon Recovery (mixed refrigerant and propane refrigeration methods), and Desulfurization & Sulfur Recovery. Gas separation capabilities include Pressure Swing Adsorption (PSA), Membrane Separation, and Cryogenic Separation technologies. Chemical Engineering Design Services provide comprehensive engineering consulting and EPC capabilities. The energy investment segment operates LNG plants and CNG/LNG filling stations through subsidiaries like Shaya Sepmem Energy and Xinjiang Sepmem Energy. Additional offerings include Energy-Efficient Air Coolers and turnkey Natural Gas Processing OEM services where the company provides equipment and manages operations for customers.

Differentiator

Problem solved

Functional benefit

Brands

• HP-Amine™: Proprietary series of amine-based absorption solutions for natural gas decarbonization and desulfurization.
• Unattended LNG Container Unit (无人值守型LNG集装箱装置)

Products and services

• Natural Gas Liquefaction (MRC Technology) Natural gas liquefaction system using mixed refrigerant cycle for cooling and liquefying purified natural gas. Applicable scale 10,000 to 3,000,000 Nm³/d, with LNG temperature as low as -162°C and source pressure up to 8.0 MPa.
• Modular LNG Technology Factory-pre-assembled modular construction approach for LNG projects reducing construction time and environmental impact compared to traditional on-site construction methods.
• Container/Skid-Mounted LNG Technology Containerized/skid-mounted LNG装置 providing complete process units installed in standardized modules that can be moved as a whole, enabling rapid relocation and reuse for small-scale LNG projects. Unmanned operation capable; 4 hours to LNG production; one-button shutdown; zero waste discharge; 3-day relocation.
• HP-Amine™ Desulfurization & Decarbonization Acid gas removal technology using HP-Amine series solutions as absorbent for H2S and CO2 removal from natural gas, applicable for 50,000 to 20,000,000 Nm³/d capacity with H2S/CO2 purity as low as 1 ppm.
• Triethylene Glycol (TEG) Dehydration Solvent absorption dehydration technology using triethylene glycol solvent to remove moisture from natural gas, suitable for 50,000 to 30,000,000 Nm³/d capacity with 30-70°C dew point drop.
• Mixed Refrigerant Light Hydrocarbon Recovery Process using mixed refrigerants (C1-C5 hydrocarbons and N2) to cool raw gas to -50°C or below for separation of natural gas, LPG, and NGL products through multi-stage distillation.
• Propane (or Ammonia) Refrigeration Light Hydrocarbon Recovery Pure propane or ammonia as refrigerant for cooling gas to -40°C (propane) or -30°C (ammonia) followed by distillation for light hydrocarbon recovery, suitable for smaller scale with higher recovery rates.
• Liquid Phase Oxidation Desulfurization & Sulfur Recovery Wet desulfurization technology using chelated iron ions as catalyst for H2S removal and sulfur recovery, applicable for 0.5-30 t/d capacity with integrated desulfurization and sulfur recovery, zero liquid waste discharge.
• Pressure Swing Adsorption (PSA) Physical gas adsorption separation technology using pressure variation for H2, CH4, CO, CO2 recovery and purification, applicable for 100-200,000 Nm³/h processing capacity with product purity up to 99.999% and adsorbent lifespan over 10 years.
• Membrane Separation Gas membrane separation technology for hydrogen recovery, CO2 removal, and natural gas purification with 50+ installations, applicable for 1,000-5,000,000 Nm³/d capacity with recovery rates up to 99% and purity up to 99.9%. Over 10-year membrane lifespan.
• Cryogenic Separation Low-temperature (-40°C or below) distillation using expansion methods for gas liquefaction and separation. 20+ units deployed for enriched nitrogen LNG and coke oven gas liquefaction. Operating flexibility 50-110%; scale 10,000-3,000,000 Nm³/d; product recovery up to 99%; lifespan avg. 20 years.
• Chemical Engineering Design Services Engineering design and consulting services including process technology packages, feasibility studies, HAZOP/LOPA analysis, SIS design, safety diagnostics, environmental engineering, and EPC/EPCm contract services across inorganic, organic, and environmental engineering sectors.
• Natural Gas Processing Services (OEM / Commissioned Processing 代加工) Turnkey natural gas processing equipment provision with full production operation management, where customers provide raw gas and receive LNG or CNG products with zero investment and zero operational risk. Equipment can be transferred to customer after an operating period.
• Shaya Sepmem Energy Co., Ltd. (LNG Operations) Subsidiary operating LNG plant in Shaya County with daily processing capacity of 400,000 m³ of scattered gas, producing 300 tons of liquefied natural gas per day. Operations located in the Shunbei oil and gas field area.
• Xinjiang Sepmem Energy Co., Ltd. (LNG/CNG Sales and Operations) Subsidiary engaged in CNG/LNG transportation and sales, construction and operation of liquefaction plants, CNG mother stations, LNG filling stations, and distributed energy technology R&D in Xinjiang. Operates 7 LNG/CNG/L-CNG stations and a 300,000 m³/d liquefaction plant in the Shunbei block.
• Energy-Efficient Air Cooler Plate-fin air cooler with vacuum-brazed aluminum construction, pressure resistance up to 100+ kg, heat exchange area up to 2000 m²/m³, and 60%+ energy savings compared to conventional air coolers (operating power only 30-40% of conventional units).
• Large Temperature Difference Circulating Water Cooling System Closed-loop cooling system using high-efficiency heat exchangers and plate-fin air coolers to achieve 30-40°C temperature difference, reducing water consumption by 80%, achieving 70%+ energy savings vs conventional indirect air cooling, zero water consumption, zero wastewater discharge.

Quantifiable outcome

• Over 3 million m³/day scattered gas recovery capacity across all facilities
• +6 more outcomes

Named customers12 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature9 records

Partnerships

Six partnerships are on record, tiered minor, supportive and core.

• Donghua Engineering Technology Co., Ltd. (东华工程科技股份有限公司)minorStrategic or Co-development Partner · 1 April 2020Sepmem won the bid in April 2020 for the PSA hydrogen recovery unit in Shanxi Yaxin New Energy's coke oven gas-to-300,000 t/a methanol co-produced synthesis ammonia project, which Donghua Engineering is the EPC general contractor.
• Shaya County Government (沙雅县人民政府)supportiveOthers · 1 June 2019Shaya County government, led by Deputy Mayor Yang Jie, maintains regular engagement with Shaya Sepmem Energy Co., Ltd. as a key linked enterprise. Government provides policy support and coordinates local resources. County officials visited the facility in June 2019, praising the company's entrepreneurial spirit in the desert region and committing government services.
• China 5环 Engineering Co., Ltd. (中国五环工程有限公司)minorStrategic or Co-development Partner · 1 December 2017Contract signed in December 2017 for Inner Mongolia Rongxin Chemical's 400,000 t/a ethylene glycol and 300,000 t/a DMMn project hydrogen recovery PSA unit. Sepmem supplies PSA equipment; China 5环 provides engineering and procurement. Follow-up to previous collaboration on Rongxin's methanol purge gas membrane recovery project.
• Zhong'an United Coal-to-Chemical Co., Ltd. (中安联合煤化有限责任公司)minorStrategic or Co-development Partner · 8 November 2017Detailed design review meeting held at Sepmem's Chengdu office for the methanol synthesis PSA hydrogen recovery unit in Zhong'an's coal-to-methanol and methanol-to-olefin project. Sinopec Nanjing Engineering participated in the review. Project demonstrates Sepmem's position in large-scale coal chemical PSA applications.
• MCC International Engineering Group (中冶国际工程集团有限公司)coreStrategic or Co-development Partner · 28 October 2015Strategic partnership signed in Beijing on October 28, 2015, establishing a strategic alliance for shared oil and gas field engineering market resources. MCC International provides the international platform while Sepmem brings proprietary natural gas processing technology. The partnership aimed to jointly develop international oil and gas field engineering projects and participate in overseas project bids. Sepmem CEO Zhang Chunlai (张春来) and MCC International CEO Chen Shaochun (陈少春) attended the signing ceremony.
• Baosteel Group Xinjiang Bayi Steel Co., Ltd. (宝钢集团新疆八一钢铁有限公司)coreStrategic or Co-development Partner · 1 April 2015Joint venture Xinjiang Sepmem Energy Co., Ltd. (新疆赛普能源有限公司) established in April 2015 to implement Baosteel's modern industrial logistics LNG refueling station project in Xinjiang. Baosteel provides logistics operations and fleet demand; Sepmem provides LNG production and supply infrastructure. Project includes 7 LNG/CNG/L-CNG stations and LNG tanker fleet serving Bayi Steel's mineral transport routes.

Scale indicators9 records

Recent moves17 records

Expansion highlights6 records

Direct peers

• Hangzhou Hangyang (杭氧股份): China's leading industrial gas equipment manufacturer (air separation units, cryogenic separation equipment) serving petrochemical, steel and chemical customers. Overlaps directly with Sepmem's cryogenic separation and gas separation product lines and serves a comparable Chinese SOE customer base.
• Sichuan Air Separation Group / Sichuan Tianyi (四川空分): Sichuan-based manufacturer of air separation, natural gas liquefaction and cryogenic equipment with deep roots in China's Southwest industrial gas market. Most direct geographic and product overlap with Sepmem's Chengdu base and LNG/gas separation portfolio.
• Shuangliang Eco-energy (双良节能): Shuangliang manufactures plate-fin heat exchangers, brazed aluminum heat exchangers (similar to Sepmem's plate-fin air cooler) and cryogenic/LNG heat exchange equipment. Direct product overlap on key proprietary components Sepmem uses in its modular LNG plants.
• Jereh Group (杰瑞股份): Jereh Group provides oilfield equipment and integrated services including gas processing, LNG plant equipment and gas compression/power generation solutions for E&P operators globally. Very comparable business model to Sepmem — equipment manufacturing, project EPC and recurring service revenue in the natural gas processing value chain.

Broad incumbents

• China Petroleum Engineering & Construction Corp (CPECC): CNPC-affiliated EPC general contractor for oil & gas field surface engineering, gas processing plants and LNG facilities — directly comparable service scope but at much larger scale and with general-contractor role that often positions Sepmem as a sub-supplier.
• Chart Industries: Global leader in cryogenic and LNG equipment, supplying heat exchangers, cold boxes and liquefaction technology used in small-scale and large-scale LNG plants. Comparable product technology but operates at global scale across many end markets beyond Sepmem's Chinese O&G focus.
• Linde / Linde Engineering: Linde Engineering provides plant engineering for hydrogen, syngas, air separation and natural gas processing, competing in the same gas separation/liquefaction space but with broader industrial gas merchant business and global EPC scale.
• Sinopec Engineering (Group) Co., Ltd. (SEG, 中石化炼化工程): Sinopec's EPC arm executing large refining, petrochemical and gas processing projects; competes with Sepmem in coal-to-chemical gas separation bids and is a frequent general contractor that uses Sepmem's PSA/membrane packages.

Regional players

• ENN Energy (新奥能源): Major Chinese private LNG/CNG downstream operator with city gas distribution and clean energy station networks. Comparable in the LNG/CNG retail and station business lines that Sepmem operates in Xinjiang through its JV with Baosteel.
• Kunlun Energy (昆仑能源): CNPC-affiliated LNG terminal, storage and distribution operator that owns and operates Jilin LNG processing assets — the Jilin Kunlun collaboration is a Sepmem customer. Comparable in LNG downstream operations but with much larger terminal/wholesale footprint.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance24 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Subsidiaries5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sepmem