Short Description:
Keywords:
Cryogenic Gate Valve -196℃ Gate Valve LNG Gate Valve Low Temperature Gate Valve Cryogenic Isolation Valve Extended Bonnet Gate Valve Cryogenic Service Valve Z40H Cryogenic Valve LN2 Shutoff Valve API 600 Cryogenic Valve
Product Short Description:
Womic Steel supplies high-performance cryogenic gate valves engineered for reliable isolation and shutoff in extreme low-temperature services down to -196°C, specifically designed for LNG receiving terminals, liquefaction plants, air separation units, liquid nitrogen/liquid oxygen systems, and ethylene processing plants. Our cryogenic gate valves feature extended bonnet with drip plate to protect stem seals from cryogenic temperatures, wedge or parallel slide disc designs, and bolted bonnet construction with spiral wound gaskets for reliable service. Available in sizes from 1/2" to 48" (DN15 to DN1200) with pressure ratings from Class 150 to Class 2500. Body materials include austenitic stainless steel (CF3, CF3M, CF8, CF8M) and low-temperature carbon steel (LCB, LCC) with mandatory Charpy impact testing at -196°C per BS 6364. All pressure-containing parts undergo deep cryogenic treatment at -196°C to ensure dimensional stability and prevent distortion at service temperatures. Gate and seat sealing surfaces are hardfaced with Stellite alloy to provide excellent wear resistance and prolonged service life in cryogenic environments. Valves can be supplied with ISO 15848-1 low fugitive emission packing, rising stem (OS&Y) or non-rising stem configurations, and pneumatic or electric actuation. Mill certificate EN 10204 3.1/3.2, hydrostatic test, cryogenic performance test per BS 6364, fugitive emission test available. Factory direct supply for LNG, industrial gas, and cryogenic industrial projects worldwide .
Cryogenic Gate Valve Size: 1/2" – 48" (DN15 – DN1200)
Standard & Grade of Cryogenic Gate Valve: BS 6364, API 600, API 6D, ASME B16.34, MSS SP-134, ISO 15848-1 (fugitive emission), NACE MR0175, API 598
Usage of Cryogenic Gate Valve: LNG receiving terminals, LNG liquefaction plants, LNG carrier loading arms, air separation units (ASU), liquid nitrogen/liquid oxygen pipelines, liquid hydrogen service, ethylene and propylene plants, low temperature methanol service, cryogenic gas processing, liquid helium service, cryogenic storage vessels, cold box piping, main cryogenic shutoff services
Womic Steel offering high quality & competitive prices of cryogenic gate valve, -196℃ low temperature shutoff valve, LNG gate valve, extended bonnet cryogenic gate valve, API 600 cryogenic gate valve. Mill certificate EN 10204 3.1/3.2, hydro test, cryogenic performance test, deep cryogenic treatment, Stellite hardfaced sealing surfaces, low fugitive emission design, NACE MR0175 compliant. Factory direct supply for LNG and cryogenic industrial projects worldwide.
1. Womic Steel: Manufacturing Capabilities & Company Strength
Womic Steel Group is a premier manufacturer and global supplier of cryogenic gate valves with over 20 years of expertise in producing high-performance valves for extreme low-temperature isolation and shutoff services. Our state-of-the-art manufacturing facility integrates forging, machining, assembly, and testing capabilities :
l Cryogenic Gate Valve Production Line: Dedicated cryogenic valve manufacturing line with CNC machining centers, large-bore valve machining equipment (capable of handling up to 48" valves), and cryogenic testing facilities capable of testing valves down to -196°C using liquid nitrogen. Annual production capacity exceeding 10,000 cryogenic gate valves.
l Deep Cryogenic Treatment Facility: In-house cryogenic treatment furnace (-196°C) for stress relief of all pressure-containing parts, ensuring dimensional stability and preventing distortion at service temperatures. Parts are soaked for minimum 8 hours per BS 6364 requirements .
All cryogenic gate valves are designed with:
• Extended bonnet with drip plate to maintain stem packing at operable temperatures and prevent ice formation
• Bolted bonnet construction with spiral wound gaskets (graphite + SS) for reliable sealing
• Wedge or parallel slide gate designs with Stellite hardfaced sealing surfaces for superior wear resistance
• Rising stem (OS&Y) or non-rising stem configurations
• Low fugitive emission packing meeting ISO 15848-1 (Class A or B)
• Backseat feature for stem seal redundancy
• Sour service compliant options per NACE MR0175
Quality Certifications & Regulatory Compliance:
l ISO 9001:2015 Certified
l PED 2014/68/EU (CE Marking) for pressure equipment
l API 600 / API 6D Design Compliance
l ISO 15848-1 Low Fugitive Emission Certification
l EN 10204 3.2 Certification with third-party validation (TÜV, BV, SGS, LR)
l Third-Party Inspection (TPI) approved by SGS, BV, ABS, DNV, TÜV, Lloyd's Register
Production Flexibility for Cryogenic Gate Valves:
l Sizes: 1/2" – 48" (DN15 – DN1200)
l Pressure Rating: Class 150 – Class 2500 (PN20 – PN420)
l End Connections: Flanged (RF, RTJ per ASME B16.5/B16.47), Butt Weld (BW per ASME B16.25), Socket Weld (SW per ASME B16.11)
l Body Materials: LCB, LCC, CF3, CF3M, CF8, CF8M
l Gate Types: Solid Wedge (for smaller sizes), Flexible Wedge, Parallel Slide (for large sizes and high pressure)
l Seat Hardfacing: Stellite 6 or Stellite 21 (Standard)
l Actuation: Handwheel (Manual), Gear (Manual for larger sizes), Pneumatic, Electric
l Monthly production capacity: 800-1,200 units depending on size and complexity
Global Recognition: Womic Steel is a trusted supplier to global shipyards and EPC contractors including COSCO Shipping, Hyundai Heavy Industries, and Keppel Shipyard for LNG carrier and FPSO applications. Our products are certified by ABS, DNV, LR, BV, CCS, and other major classification societies .
2. Cryogenic Gate Valve: Material Composition & Key Specifications
Cryogenic gate valves operate at temperatures as low as -196°C, where standard materials become brittle and standard sealing systems fail due to thermal contraction. Our cryogenic gate valves are specifically engineered for these extreme conditions with design features validated by BS 6364, API 600, and API 6D .
Key Design Features for -196°C Service:
Extended Bonnet with Drip Plate: The bonnet is extended to ensure the packing area (stem seals) stays at a temperature above freezing, preventing ice formation and maintaining seal integrity. The drip plate prevents condensed moisture from dripping onto insulation .
Deep Cryogenic Treatment: For service temperatures ≤ -101°C, all pressure-containing parts (body, bonnet, gate, stem) are subjected to deep cryogenic treatment at -196°C for minimum 8 hours (or multiple cycles) to transform retained austenite, relieve residual stresses, and ensure dimensional stability at service temperature. This is a mandatory requirement per BS 6364 and API 6D .
Stellite Hardfaced Sealing Surfaces: Gate and seat sealing surfaces are hardfaced with Stellite alloy (typically Stellite 6 or Stellite 21). This provides excellent wear resistance, prevents galling and seizing at cryogenic temperatures, and extends valve service life significantly compared to non-hardfaced designs .
Bolted Bonnet Construction: Per BS 6364 and API 600 requirements, cryogenic gate valves feature bolted bonnet construction with spiral wound gaskets for reliable sealing and ease of maintenance.
Specialized Materials for Cryogenic Service:
| Component | Material Options | Temperature Range | Key Characteristics |
|---|---|---|---|
| Body/Bonnet | ASTM A352 LCB/LCC | -46°C to +300°C | Low temperature carbon steel |
| Body/Bonnet | ASTM A351 CF3/CF3M (304L/316L SS) | -196°C to +300°C | Austenitic stability at cryogenic temps |
| Body/Bonnet | ASTM A351 CF8/CF8M (304/316 SS) | -196°C to +300°C | Higher carbon version |
| Gate | ASTM A182 F304/F316 | -196°C to +300°C | Stellite hardfaced |
| Seat Rings | ASTM A182 F304/F316 | -196°C to +300°C | Stellite hardfaced, replaceable |
| Stem | ASTM A182 F304L/F316L | -196°C to +300°C | Extended strength at low temps |
| Stem | ASTM A182 F XM-19 | -196°C to +300°C | Higher strength, superior wear |
| Body Gasket | Spiral Wound (Graphite + SS) | -196°C to +400°C | Fire-safe, reliable seal |
| Stem Packing | Low Fugitive Emission Graphite | -196°C to +400°C | ISO 15848 certified |
| Bolting | ASTM A320 Gr.L7 / A194 Gr.7 | -46°C to +300°C | For LCB/LCC body |
| Bolting | ASTM A320 Gr.B8 CL.2 / A194 Gr.8 | -196°C to +400°C | For SS body |
| Hardfacing | Stellite 6 / Stellite 21 | -196°C to +400°C | Gate and seat sealing surfaces |
Critical Material Verification:
✔100% PMI (Positive Material Identification) on all alloy components
✔Charpy V-notch impact testing at -196°C for body/bonnet material
✔Hardness testing for sour service applications (per NACE MR0175)
✔All castings 100% PT and UT inspected for defects
3. Dimensional Range & Standards Compliance
| Item | Specification |
|---|---|
| Design Standard | BS 6364, API 600, API 6D, ASME B16.34, MSS SP-134 |
| Type | Bolted Bonnet, OS&Y (Rising Stem) or Non-Rising Stem |
| Size Range | 1/2" – 48" (DN15 – DN1200) |
| Pressure Rating | Class 150 – Class 2500 (PN20 – PN420) |
| Temperature Range | -196°C to +300°C (depending on materials) |
| End Connections | Flanged (RF, RTJ per ASME B16.5/B16.47), Butt Weld (BW per ASME B16.25), Socket Weld |
| Face-to-Face | ASME B16.10, API 6D |
| Fugitive Emission | ISO 15848-1 (Class A or B) |
| Bolting | ASME B16.34, ASTM A320/A194 |
| Cryogenic Testing | BS 6364, MSS SP-134 |
| Hydrostatic Testing | API 598 |
| Actuation | Handwheel, Gear, Pneumatic, Electric |
Design Features per BS 6364 and API 600:
l Extended bonnet length ensures packing at viable operating temperature (mandatory for ≤ -101°C)
l Backseat feature for stem seal redundancy
l Stellite hardfaced gate and seat sealing surfaces
l Wedge gate (solid or flexible) or parallel slide design
l Replaceable seat rings for ease of maintenance
4. Available Configurations – Cryogenic Gate Valve (-196°C)
| Size | Pressure Class | Body Material | Gate Type | End Connection | Actuation | Typical Application |
|---|---|---|---|---|---|---|
| 1/2" – 2" | CL150-2500 | A182 F304L/F316L | Wedge | SW/NPT/BW | Handwheel | Instrumentation, sampling lines |
| 2" – 8" | CL150-2500 | A351 CF3/CF3M | Wedge | Flange/BW | Handwheel/Gear | LNG plant, ASU isolation |
| 2" – 8" | CL150-600 | A352 LCB/LCC | Wedge | Flange/BW | Handwheel | LNG receiving terminals |
| 6" – 24" | CL150-900 | A351 CF3/CF3M | Wedge/Parallel | Flange/BW | Gear | Main LNG transfer lines |
| 6" – 24" | CL150-600 | A352 LCB/LCC | Wedge | Flange/BW | Gear | Low temp carbon steel service |
| 12" – 42" | CL150-300 | A351 CF3/CF3M | Parallel Slide | Flange/BW | Gear/Electric | LNG storage tank outlet |
| 2" – 48" | CL150-2500 | A351 CF3M | Parallel Slide | BW only | Gear/Electric | High pressure cryogenic |
Custom configurations outside these ranges available upon request. For sizes ≥ 2" in pipeline service, API 6D design applies .
Key Design Features - Wedge Gate (Sizes ≤ 24"):
l Solid wedge for smaller sizes, flexible wedge for larger sizes
l Self-aligning seat design
l Low operating torque
l Excellent shutoff performance
Key Design Features - Parallel Slide (Sizes ≥ 12"):
l Lower operating torque for large sizes
l Floating seat design for thermal cycling
l Superior sealing at cryogenic temperatures
l Double block and bleed capability
5. Common Standards for Cryogenic Gate Valves
| Standard | Description | Application |
|---|---|---|
| BS 6364 | Specification for cryogenic valves for LNG and low temperature service | Primary design standard for cryogenic service |
| API 600 | Steel gate valves for petroleum and natural gas industries | Gate valve design standard |
| API 6D | Specification for pipeline and piping valves | Pipeline gate valve standard |
| ASME B16.34 | Valves - flanged, threaded, and welding end | Pressure-temperature rating basis |
| MSS SP-134 | Standard for valves for cryogenic service | US cryogenic valve standard |
| ISO 15848-1 | Industrial valves - measurement and test procedures for fugitive emissions | Low fugitive emission certification |
| ASME B16.10 | Face-to-face and end-to-end dimensions | Installation dimension standard |
| API 598 | Valve inspection and testing | Test acceptance criteria |
| NACE MR0175 / ISO 15156 | Petroleum and natural gas industries - materials for H2S environments | Sour service compliance |
Usage: LNG receiving terminals, LNG liquefaction plants, LNG carrier loading arms, air separation units (ASU), liquid nitrogen/liquid oxygen pipelines, liquid hydrogen service, ethylene and propylene plants, low temperature methanol service, cryogenic gas processing, liquid helium service, cryogenic storage vessels, cold box piping, main cryogenic shutoff services.
6. Manufacturing Process – Cryogenic Gate Valve (-196°C)
Womic Steel employs specialized manufacturing processes for cryogenic gate valves with emphasis on material qualification, deep cryogenic treatment, Stellite hardfacing, and cryogenic performance verification.
Step 1: Raw Material Inspection and PMI
l Body and bonnet castings/forgings verified by chemical analysis and PMI
l Charpy impact testing at -196°C per BS 6364 to verify low-temperature toughness
l 100% PT (Penetrant Testing) and UT (Ultrasonic Testing) on castings for defects
l Hardness testing for sour service applications
Step 2: Machining
l CNC machining of body, bonnet, gate, and stem to precise tolerances
l Specialized machining of gate and seat sealing surfaces
l Surface finish of sealing areas prepared for hardfacing
Step 3: Stellite Hardfacing (Critical for Wear Resistance)
l Gate and seat sealing surfaces hardfaced with Stellite alloy (Stellite 6 or 21)
l Hardfacing applied by PTA (Plasma Transfer Arc) or TIG welding
l Hardfacing thickness: minimum 1.5mm after machining
l Post-weld heat treatment to relieve stress
l Machining of hardfaced surfaces to final dimensions and surface finish
Step 4: Deep Cryogenic Treatment (Critical for -196°C Service)
l All critical components subjected to deep cryogenic treatment at -196°C (liquid nitrogen soak)
l Minimum soak time: 8 hours per BS 6364 (typically 8-12 hours)
l Multiple cycles for large or complex castings
l Purpose: Transform retained austenite, relieve residual stresses, ensure dimensional stability
l Followed by tempering to restore ductility
Step 5: Assembly
l Components cleaned to remove any oil, grease, or contaminants
l All assembly performed in clean room environment
l Lubrication with cryogenic-compatible lubricants
l Seat ring installation and alignment
l Stem seal and packing installation with low fugitive emission packing
l Extended bonnet assembly with drip plate positioned above insulation line
Step 6: Pre-Test Inspection
l Dimensional verification of all critical dimensions per ASME B16.34
l Torque verification of bolting
l Pneumatic seat test (low pressure) before hydrostatic testing
Step 7: Hydrostatic Test (Per API 598)
l Shell test: 1.5 × design pressure for minimum 15 seconds, no visible leakage
l Seat test: 1.1 × design pressure, low pressure seat test (0.5-0.7 MPa)
l No visible leakage on closure elements
Step 8: Cryogenic Performance Test (Critical for -196°C Service per BS 6364)
l Valve immersed in liquid nitrogen (-196°C) for minimum 2 hours
l Low pressure (0.6 MPa) pneumatic seat test at temperature
l Seat leakage measured (≤ 0.1 cc/min per inch of seat diameter)
l No damage or distortion allowed
Step 9: Fugitive Emission Test (Per ISO 15848-1)
l Valves with low fugitive emission packing tested per ISO 15848-1
l Leakage measured on helium leak detector
l Acceptance: Class A or B depending on customer requirement
Step 10: Final Inspection and Marking
l Visual inspection for surface defects, coating integrity, marking legibility
l Permanent marking per BS 6364 / API 600: manufacturer, size, pressure class, material, temperature rating, test stamp, serial number
l Documentation preparation and review
7. Quality Control & Testing Procedures for Cryogenic Gate Valve (-196°C)
| Stage | Inspection Method | Purpose |
|---|---|---|
| Raw Material | PMI (Positive Material Identification) | Verify alloy grade and chemistry |
| Raw Material | Charpy Impact Test at -196°C | Verify low-temperature toughness per BS 6364 |
| Raw Material | PT/UT (Casting Inspection) | Detect casting defects, inclusions, porosity |
| After Stellite Hardfacing | Hardness Test | Verify hardfacing quality and hardness |
| After Hardfacing | PT Inspection | Detect hardfacing cracks or porosity |
| Machining | Dimensional Inspection | Verify critical dimensions per ASME B16.34 |
| After Deep Cryogenic Treatment | Dimensional Re-inspection | Verify dimensional stability after treatment |
| Assembly | Visual Inspection | Check for contamination, proper assembly |
| Pre-Test | Pneumatic Seat Test (Low Pressure) | Verify initial seal integrity |
| Finished Valve | Hydrostatic Shell Test | Pressure integrity per API 598 |
| Finished Valve | Hydrostatic Seat Test | Seat seal integrity per API 598 |
| Finished Valve | Cryogenic Performance Test per BS 6364 | -196°C performance verification |
| Finished Valve | Fugitive Emission Test (per ISO 15848-1) | Low leak seal integrity |
| Finished Valve | Visual and Dimensional Inspection | Final quality verification |
| Finished Valve | Marking Verification | Ensure permanent marking per standards |
Optional Tests for Critical Cryogenic Applications:
l Helium Leak Test (mass spectrometer) for critical services
l High pressure gas seat test
l Thermal Shock Test per EN 12567
l ATEX compliance for explosive atmospheres
l NACE MR0175 compliance for sour service
8. Primary Applications – Cryogenic Gate Valve (-196°C)
l LNG Receiving Terminals: Imported LNG from carriers enters storage tanks through unloading arms, controlled by cryogenic gate valves for reliable isolation. Large bore valves (up to 42") are used for tank inlet and outlet services .
l LNG Liquefaction Plants: Natural gas is cooled to -162°C for liquefaction. Cryogenic gate valves provide isolation for heat exchangers, separators, and fractionation columns.
l LNG Carrier Loading Arms: During loading from terminal to LNG carrier, cryogenic gate valves provide emergency shutdown and flow isolation. Large bore valves with API 6D design are specified .
l Air Separation Units (ASU): Liquid nitrogen (-196°C), liquid oxygen (-183°C), and liquid argon (-186°C) production and distribution. Gate valves provide reliable isolation for product extraction and storage.
l Liquid Hydrogen Service: Liquid hydrogen at -253°C requires specialized cryogenic gate valves with extended bonnets and fully austenitic stainless steel construction.
l Ethylene and Propylene Plants: Low temperature applications at -40°C to -104°C. Cryogenic gate valves are standard in ethylene cold sections and propylene refrigeration circuits.
l Cryogenic Storage Vessels: Tank outlet and inlet isolation for cryogenic storage tanks requires reliable gate valve shutoff with Stellite hardfaced seats for long service life.
l Cold Box Piping: Air separation unit cold box internal piping uses cryogenic gate valves for process isolation.
l Main Cryogenic Shutoff Services: Gate valves are preferred for main isolation services where low pressure drop and positive shutoff are required.
9. Packaging & Shipping – Cryogenic Gate Valve (-196°C)
Packaging:
l Protection: All valves wrapped in rust-preventive paper or VCI paper. Flanges and end connections covered with plastic caps or steel blind flanges .
l End Protection: Plastic caps for SW ends; steel blind flanges with gaskets for flanged ends. Butt weld ends protected with plastic or steel end caps.
l Wooden Crates: For small valves, individual or multiple units packed in sturdy wooden crates with foam padding. Export-grade plywood crates with corner braces .
l Steel Cradles: For large valves (> 12"), individual steel cradles with flanged supports. Valves secured by bolting to the cradle.
l Desiccant: Silica gel desiccant bags placed inside crates to absorb moisture.
Shipping:
l Mode of transportation: Air freight for urgent valves; sea freight for large valves and bulk orders.
l Containerization: Small valves palletized and loaded into containers; large valves in flat rack containers.
l Break-bulk: Extra-large or heavy valves (> 24" or > 5 tons) shipped individually on break-bulk vessels.
l Labeling: Each crate labeled with valve tag number, size, pressure class, material, serial number, and handling instructions .
Documentation Provided with Each Shipment:
l Mill Test Certificate (EN 10204 Type 3.1; Type 3.2 upon request)
l Hydrostatic Test Report
Cryogenic Performance Test Report per BS 6364
l Fugitive Emission Test Report (if applicable)
l Stellite Hardfacing Test Report
l Material Test Reports (including Charpy impact at -196°C)
l PMI Test Reports
l Deep Cryogenic Treatment Record
l NDE Reports (PT, UT)
l Packing List, Commercial Invoice, Bill of Lading, Certificate of Origin
l CE Declaration of Performance
10. Womic Steel Advantages & FAQ – Cryogenic Gate Valve (-196°C)
Why Partner with Womic Steel for Cryogenic Gate Valves?
✔ Complete Size Range: 1/2" – 48" (DN15 – DN1200), Class 150 – Class 2500 .
✔ Stellite Hardfaced Gate and Seat – standard for all cryogenic gate valves, ensuring extended service life .
✔ Deep Cryogenic Treatment at -196°C – ensures dimensional stability (per BS 6364) .
✔ Guaranteed cryogenic performance – 100% valves tested at -196°C per BS 6364 .
✔ Bolted bonnet construction – reliable sealing and ease of maintenance.
✔ Extended bonnet with drip plate – standard for all cryogenic gate valves .
✔ Low fugitive emission – ISO 15848-1 Class A or B packing .
✔ Choice of body materials: LCB, LCC, CF3, CF3M, CF8, CF8M .
✔ Wedge or parallel slide gate designs – optimized for size and service conditions.
✔ PED 2014/68/EU CE marking.
✔ Class-approved – ABS, DNV, LR, BV, CCS certified .
✔ Competitive lead times: 10-14 weeks for standard configurations, 16-22 weeks for large-bore custom designs.
Frequently Asked Questions (FAQ) – Cryogenic Gate Valve (-196°C)
Q: What is the difference between a cryogenic gate valve and a standard gate valve?
A: Cryogenic gate valves have several key features not found in standard valves: extended bonnet with drip plate to protect stem seals ; deep cryogenic treatment of all components; Stellite hardfaced gate and seat sealing surfaces for wear resistance ; specialized materials for low-temperature toughness; low fugitive emission packing; and mandatory cryogenic performance testing per BS 6364 . Standard gate valves typically have non-extended bonnets, non-hardfaced sealing surfaces, and no cryogenic testing.
Q: What is the minimum service temperature for your cryogenic gate valves?
A: Our standard cryogenic gate valves are rated for -196°C service (liquid nitrogen temperature) per BS 6364 . For liquid hydrogen (-253°C) or liquid helium (-269°C) service, we offer specialized designs with modified materials and seals.
Q: What is deep cryogenic treatment and why is it required?
A: Deep cryogenic treatment is the process of cooling valve components to -196°C for minimum 8 hours. This transforms retained austenite, relieves residual stresses, and ensures dimensional stability at service temperature. BS 6364 requires deep cryogenic treatment for valves with service temperatures ≤ -101°C .
Q: What is Stellite hardfacing and why is it used?
A: Stellite hardfacing is the application of a wear-resistant cobalt-chromium alloy (Stellite 6 or 21) to gate and seat sealing surfaces . This provides excellent wear resistance, prevents galling and seizing at cryogenic temperatures, and extends valve service life significantly. Stellite hardfacing is a standard feature of cryogenic gate valves per API 600.
Q: What is the difference between wedge gate and parallel slide gate designs?
A: Wedge gate valves (solid or flexible wedge) are typically used for sizes up to 24" and provide excellent shutoff performance. Parallel slide gate valves (floating seats) are used for larger sizes (≥ 12") and reduce operating torque while maintaining superior sealing performance in thermal cycling applications .
Q: Is cryogenic performance testing mandatory?
A: Per BS 6364 and MSS SP-134, cryogenic performance testing is mandatory for valves used in LNG and cryogenic service. Tests must be performed at -196°C (liquid nitrogen) with low pressure pneumatic seat test after temperature stabilization . Womic performs 100% cryogenic performance testing on every cryogenic gate valve before shipment.
Q: Do you offer low fugitive emission packing?
A: Yes. All our cryogenic gate valves are supplied with low fugitive emission packing tested to ISO 15848-1. We can offer Class A or Class B certification depending on your requirements .
Q: Can you supply cryogenic gate valves with NACE MR0175 compliance?
A: Yes. For sour service cryogenic applications (LNG with H2S or ethylene with H2S), we supply cryogenic gate valves with NACE MR0175 / ISO 15156 compliant materials. This includes hardness testing, appropriate material selection, and documented compliance .
Q: What is the typical lead time for cryogenic gate valves?
A: Standard lead time is 10-14 weeks for standard configurations (sizes ≤ 24", Class 150-600). For larger sizes (> 24") or high pressure (Class 900+), lead time is 16-22 weeks. Rush orders may be available for smaller quantities.
Q: Do you offer actuation for cryogenic gate valves?
A: Yes. We offer manual operation with handwheel or gear operator, pneumatic actuation (spring-return or double-acting), electric actuation (on-off or modulating), and hydraulic actuation. All actuators are sized to provide adequate torque at cryogenic temperatures.
Project Experience & Case Study – Cryogenic Gate Valve (-196°C)
Project: LNG Carrier Newbuilding – COSCO Shipping, China
Standard & Grade: BS 6364, API 600, API 6D
Specifications & Quantity:
l 30" (DN750) Cryogenic Gate Valves, Class 150, CF3M Body, Parallel Slide, Stellite Hardfaced – 4 units
l 20" (DN500) Cryogenic Gate Valves, Class 150, CF3M Body, Wedge Gate, Stellite Hardfaced – 8 units
l 12" (DN300) Cryogenic Gate Valves, Class 300, CF3M Body, Wedge Gate, Stellite Hardfaced – 16 units
l 8" (DN200) Cryogenic Gate Valves, Class 300, CF3M Body, Wedge Gate, Stellite Hardfaced – 24 units
l 4" (DN100) Cryogenic Gate Valves, Class 300, CF3M Body, Wedge Gate, Stellite Hardfaced – 32 units
l 2" (DN50) Cryogenic Gate Valves, Class 600, A182 F316L, Wedge Gate, Stellite Hardfaced – 48 units
Total: 132 units
Usage: LNG carrier cargo tank isolation, main cargo line shutoff, and loading arm isolation. Service temperature: -162°C (LNG), design pressure: 1.6-4.0 MPa. Extended bonnet with drip plate, gear-operated (manual). Fire-safe design per API 6FA, low fugitive emission packing per ISO 15848-1 Class B. ABS and DNV type-approved .
Technical Challenges & Solutions:
1. Large bore valves (30") for LNG carrier main cargo line – 30" parallel slide gate valves required for LNG carrier cargo tank isolation. The large size required specialized machining and assembly. Womic supplied gear-operated parallel slide gate valves with floating seats for thermal cycling. All 4 valves passed cryogenic testing at -162°C with zero leakage .
2. Stellite hardfacing for long service life – LNG carrier valves are subject to frequent operation (opening/closing for each loading/unloading cycle). Womic supplied Stellite 6 hardfaced gate and seat surfaces for all 132 valves. Hardfacing thickness: 2.0mm after machining. Hardness: HRC 38-45 .
3. Class society type approval (ABS and DNV) – LNG carrier valves require ABS and DNV type approval per IGC Code (International Gas Carrier Code). Womic coordinated with ABS and DNV surveyors for type approval testing including cryogenic performance, hydrostatic, and fugitive emission tests. Type approval certificates issued within 60 days .
4. Deep cryogenic treatment for large castings (30" body) – Large CF3M castings (30" body) susceptible to retained austenite. Womic performed three-cycle deep cryogenic treatment (-196°C soak, 12 hours per cycle). Dimensional re-inspection confirmed no distortion after treatment.
5. Low fugitive emission packing for environmental compliance – LNG carriers operate in environmentally sensitive areas requiring ISO 15848-1 Class B packing. Womic supplied low fugitive emission graphite packing with extended bonnet design ensuring packing temperature stays above -20°C .
6. ABS and DNV surveyor witnessed testing – All 132 valves required ABS and DNV surveyor witnessed testing at Womic's facility. Womic coordinated testing schedule with both classification societies. Testing completed within 30 days. No re-test required.
7. Just-in-time delivery for LNG carrier construction schedule – LNG carrier construction schedule required phased delivery over 8 months. Womic delivered all 132 valves in 6 shipments, with each shipment arriving exactly on the required date. No delays to construction schedule.
Result: LNG carrier successfully delivered to owner in 2023. All 132 cryogenic gate valves have operated at -162°C for over 2 years with no maintenance incidents. Owner's superintendent stated: "Womic's cryogenic gate valves performed flawlessly during gas trials – we achieved zero leakage on all cargo tank isolation valves." Client issued a frame agreement for 6 additional LNG carriers .
Conact:
Website: www.womicsteel.com
E-mail: sales@womicsteel.com
Tel / WhatsApp / WeChat:
Victor: +86 15575100681
Jack: +86 18390957568
Womic Steel – Your reliable partner for cryogenic gate valves (-196°C) for LNG carriers, LNG terminals, air separation units, and industrial gas service worldwide. Class-approved by ABS, DNV, LR, BV, and CCS.
Post time: Jun-25-2026