J-VALVES · Ball Valve Manufacturer · Wenzhou, China info@j-valves.com +86-13600648865

INDUSTRY SOLUTIONS·FPSO & OFFSHORE

FPSO & Offshore Ball Valves

Class 2500 high-pressure and NACE MR0175 sour service ball valves for FPSO topsides, offshore platforms, riser interfaces and subsea-adjacent systems - engineered, tested and documented for classification society review.

API 6D

API 607 / ISO 10497 fire-safe

ISO 15848-1 low emission

NACE MR0175

ISO 9001 / 14001 / 45001

EN 10204 3.1

1/2" - 56"

Size range DN15-DN1400

Class 150-2500

PN10-PN420

30" CL2500

Largest valve we pressure test

-196°C

Cryogenic test capability

API 6D / 607

Pipeline & fire-safe certified

2 plants

Wenzhou, China since 2018
Home index fpso-offshore-valves

FPSO & Offshore

Ball Valves Engineered for Offshore Extremes

J-VALVES supplies ball valves engineered for FPSO topsides, offshore platforms, FLNG units and subsea-adjacent pipelines - API 6D trunnion mounted, DBB (double block and bleed) and actuated ball valves from Class 150 to Class 2500, with NACE MR0175 sour service materials and fire-safe design to API 607 / ISO 10497.

Offshore service punishes valves: salt-laden air, continuous vibration, weight and space limits, and maintenance windows measured in hours. Our answer is engineering discipline rather than marketing language - forged high-pressure bodies, ISO 15848-1 low-emission packing, hardened ball and seat surfaces for sand-laden produced water, and full material traceability from heat number to nameplate.

Every offshore order is delivered with a documentation package prepared for classification society and operator review: ITP with hold points, EN 10204 3.1 material certificates, hydrostatic and seat test records, NDE reports and coating inspection data.
TOP BALL VALVES AND DBB BALL VALVES
Class 2500 trunnion ball valves prepared for an offshore project
Pressure-Testing-Equipment
Pressure test bench proving Class 2500 shell strength

GLOBAL MARKET ACCESS

Can You Sell Our Valves in Your Market?

Market access is a commercial question, not a technical footnote. This is how we support the compliance route for the main destination markets - confirm your market and application with us and we will state in writing exactly which certificates apply.
Target marketWhat your market usually requiresWhat J-VALVES providesEvidence in the documentation package
European UnionCE marking under the Pressure Equipment Directive, material certificates to EN 10204, technical fileCE / PED conforming valves, EU-format material certificates, declaration of conformity and technical file supportCE declaration of conformity, EN 10204 3.1 certificates, pressure test records
United KingdomUKCA marking as the post-Brexit route for pressure equipmentUKCA-aligned marking and documentation support where both UK and EU markets are servedUKCA declaration and supporting technical documentation
North America (US / Canada)API product standards, ASME B16.34 design, CRN registration in some Canadian provincesAPI 6D, API 608, API 600 and API 602 products, ASME-compliant design, CRN documentation supportAPI certification records, ASME design data, CRN submission support
Gulf and Middle EastAPI-certified products, operator vendor listing, SASO / G-mark where applicableAPI certified products, vendor-listing support, NACE MR0175 sour service materials, third-party inspectionAPI certificates, NACE material records, TPI reports
Russia and CISEAC / TR CU conformity for customs union entryEAC conforming products and documentation for the customs union marketEAC certificates and technical passports
Latin AmericaLocal conformity where regulated (for example INMETRO in Brazil), plus full project documentationProject documentation packages, third-party inspection coordination, translated labelling on requestConformity support documentation, TPI reports, translated labels
Australia and Asia-PacificProject specifications, water authority approvals for potable service, AS alignmentAS-aligned design review, potable-water material options, complete project documentationMaterial and coating certificates, potable-water compliant material records
Certification scope varies by product, size and market. We confirm in writing which certificates apply to your specific product and destination before you order - we never assume an approval covers a product it does not.

SELECTION GUIDE

Offshore Valve Selection Matrix

How we match valve construction to offshore service conditions. This is the decision table our engineers use during quotation review.
Service conditionRecommended valveBody / trim materialGoverning standard
Crude oil export & mainline, Class 150-900Trunnion mounted, full port, weld or flanged endsA216 WCB / A352 LF2 body, PTFE or metal seatAPI 6D, ASME B16.34
Sour hydrocarbon service, H2S presentTrunnion / DBB, hardness controlledA352 LF2, A352 LCC, hardness <= 22 HRCNACE MR0175 / ISO 15156
Gas compression discharge & injection, Class 900-2500Forged trunnion, anti-blowout stemA350 LF2 forged body, tungsten carbide coated ballAPI 6D, API 598
Seawater cooling, deluge & fire waterFloating or trunnion, full portDuplex 2205 / super duplex 2507, NAB C95800API 6D + NACE MR0175
Produced water & sand-laden injectionForged trunnion, metal seatedLF2 body with Ni-based overlay on ball and seatAPI 6D, 1.5x shell test
Riser / subsea-adjacent, weld endsFully welded trunnion, zero flange jointsDuplex or clad body, weld-end preparation per projectAPI 6D (API 6DSS on request)
Instrument air, diesel, utility skidsFloating, compact, actuatedCF8M / SS316, EPDM or PTFE seatAPI 608, ISO 5211

Applications

Where Our Offshore Ball Valves Are Installed

Class 150-2500 · -20 to 120°C · sour possible

FPSO Topsides

High-pressure trunnion and DBB ball valves for crude processing, gas compression, produced water treatment and export lines on FPSO vessels. Valve packages are prepared for classification society review, with fire-safe certification, low-emission packing and actuator integration on ISO 5211 mounting pads.
Trunnion mounted, 2"-56", full or reduced port
Fire-safe to API 607 / ISO 10497
NACE MR0175 materials on request
Manual, pneumatic, electric or hydraulic actuation

Class 300-2500 · vibration & salt fog

Offshore Platforms & Manifolds

Jacket and platform wellhead manifolds, export metering and utility systems rely on API 6D ball valves with NACE sour service material control. Butt-weld ends reduce flange leak paths in congested pipe racks, and the anti-blowout stem design protects against stem ejection under pressure.
Butt-weld, RTJ or flanged ends
Anti-static ball-stem spring
Double block and bleed on manifold valves
PMI and hardness verified per heat number

Up to 56" · zero leakage

Subsea & Riser Interfaces

Large-bore trunnion ball valves for export pipelines and riser bases, with fully welded body construction that removes bolted joints from the pressure boundary - the preferred architecture where maintenance access is impossible and a single leak is unacceptable.
Fully welded body, 2"-56"
Weld-end or hub preparation per project
Duplex / clad options for seawater contact
Witnessed NDE and hydrostatic testing

Class 900-2500 · continuous cycling

Gas Compression & Injection

Forged trunnion ball valves for compression skids, gas lift and water injection loops. Hardened ball and seat surfaces resist erosion from entrained solids, while measured operating torque at maximum differential pressure allows correct actuator sizing instead of guesswork.
Forged A350 LF2 / A105 body
Tungsten carbide or Ni-based hard facing
Torque measured at max dP before actuator sizing
Actuator sizing with 1.5 safety factor

API 607 · seawater exposure

Fire Water & Safety Systems

Fire-safe certified ball valves for deluge, fire water and safety shutdown networks, supplied with FBE or epoxy coating systems for continuous seawater exposure. Valves are function-tested with the actuator as a unit, not as bare valve bodies.


API 607 / ISO 10497 fire-safe
FBE or epoxy coating, DFT and holiday tested
Fail-safe actuator configurations
Functional test record with actuator

Compact · skid-builder friendly

Helifuel, Diesel & Utility Skids

Compact floating and trunnion ball valves in stainless steel and duplex for helifuel, diesel, HVAC and utility skids. We supply drawing packages that match skid fabrication practice - dimensional data, actuator envelopes and weld-end details - so integration on the skid floor is straightforward.
DN15-DN200 compact bodies
CF8M / SS316 / duplex
2D and 3D drawings for skid integration
Short lead times from stock materials

Engineering

Engineering Decisions That Define Offshore Reliability

01

High Pressure to Class 2500

Forged and cast trunnion ball valves to Class 2500 with verified shell strength. Our test benches handle up to 30" Class 2500, so the rating on the nameplate is proven under water pressure in our own plant - not only calculated on paper.

02

Sour Service to NACE MR0175

Material selection, weld hardness control and PMI verification aligned to NACE MR0175 / ISO 15156 for H2S-containing service, with heat-number traceability and EN 10204 3.1 material certificates for every valve.

03

Fire-Safe and Low Emission

API 607 / ISO 10497 fire-safe type certification combined with ISO 15848-1 low-emission packing options - the pairing offshore HSE specifications increasingly require for hydrocarbon and VOC service.

Technical Detail

Offshore Material and Coating Pairing

Offshore valves fail from the outside as often as from the inside. Material and coating systems are paired to the actual exposure - splash zone, salt-laden atmosphere or continuous seawater contact.
ItemWhat we do
Carbon steel body, moderate hydrocarbon serviceA216 WCB / WCC with PTFE seats for crude, diesel and utility lines in protected areas, with external paint system specified for the installation environment
Sour service (H2S present)A352 LF2 / LCC with hardness control to NACE MR0175, PMI and hardness verification, EN 10204 3.1 certificates per valve
Low-temperature ambient or cold serviceA352 LCC / LF2 and austenitic stainless grades qualified for impact toughness at the lowest expected ambient temperature, with impact test records
Seawater, deluge and fire water contactDuplex 2205 / super duplex 2507 or nickel-aluminum bronze (C95800) trims; carbon steel bodies protected with FBE or epoxy systems with DFT and holiday testing
Splash zone and atmospheric exposureMulti-coat marine paint systems to ISO 12944 C5-M with surface preparation to Sa 2 1/2, DFT records and repair procedure supplied for site touch-up
High-pressure gas and injection dutyForged LF2 bodies with tungsten carbide or Ni-based overlay on ball and seat, antistatic ball-stem continuity and measured torque records for actuator sizing

Project Experience

Offshore Project Experience

The following references come from J-VALVES project records. Replace or extend with your latest project data before publishing - each case should name size, class, material, testing scope and outcome.

18" Class 2500 · LF2 · Offshore

18-inch Class 2500 trunnion ball valves for offshore service

Challenge
Class 2500 pressure rating combined with low ambient temperature, sour service material control and third-party witnessed testing.
Solution
Forged LF2 body and trunnion, NACE MR0175 hardness control on welds and trim, tungsten carbide coated ball and seat, anti-blowout stem, hydrostatic shell test at 1.5x rated pressure and seat test at 1.1x.
Result
Witnessed tests passed at first submission; valves shipped with EN 10204 3.1 certificates, PMI and hardness reports, and full dimensional records.

Stainless steel · Actuated · Sour crude

Stainless steel ball valves with pneumatic and electric actuators for KOC project

Challenge
Sour crude service requiring corrosion-resistant wetted parts plus reliable actuator integration and shutdown function.
Solution
CF8M stainless steel bodies with NACE-compliant trim, ISO 5211 mounting pads, pneumatic and electric actuators sized on measured torque, fail-safe configuration, and unit functional testing with the actuator mounted.
Result
Delivered with actuator functional test records and material certificates; the same configuration has been reordered for follow-up packages.

Class 2500 · Actuated · Platform upgrade

Offshore 2500# actuated ball valves for platform upgrade

Challenge
Retrofit into an existing pipe rack with limited space and a fixed shutdown window for installation.
Solution
Compact forged trunnion bodies with optimized actuator bracket geometry, factory-set travel stops, and pre-commissioning checks performed at our plant so site work is limited to bolting and hook-up.
Result
Installation completed inside the planned shutdown window with no on-site rework.

Risk Control

Offshore Failure Modes and How We Design Them Out

Failure modeRoot causeJ-VALVES countermeasure
Seat leakage after thermal cyclingPTFE cold flow and differential expansion between ball and seat under wide temperature swingsSpring-energized seat design with metal backup ring; seat materials selected for the actual temperature range, verified by ambient and cryogenic seat tests
Stem seal leakage / fugitive emissionsPacking relaxation after pressure and temperature cyclingISO 15848-1 qualified packing with live-loaded gland and anti-extrusion rings; low-emission test data supplied with the certificate
External corrosion under coatingSalt spray attack at coating holidays, edges and bolting areasBlast preparation to Sa 2 1/2, DFT-controlled FBE or epoxy system, holiday (spark) test and adhesion test on every coated batch
Ball and seat erosion in produced waterSand and solids at high velocity across the sealing surfaceFull-port design to lower velocity, tungsten carbide or Ni-based overlay on ball and seat, hardened trunnion bearings
Actuator torque mismatchActuator selected from catalogue tables rather than measured valve torqueBreak and run torque measured at maximum differential pressure; actuator sized with a 1.5 safety factor and function tested as an assembly
Stem ejection under pressureStem retention relying on gland bolts aloneAnti-blowout stem geometry - the stem shoulder is retained by the body, so the stem cannot be ejected even with the gland removed

Quality

Testing and Quality Control - Every Valve, Every Order

The sequence below is applied to offshore orders. Items marked as witness points can be attended by BV, SGS, TUV or the customer inspector.

01 Incoming Material Inspection

Chemical composition, mechanical properties, PMI and hardness verification on body, ball, stem and seat materials; heat-number traceability recorded before machining starts.

02 Machined Dimension Inspection

Dimensional inspection against approved drawings - face-to-face, bore, flange dimensions, weld-end preparation - with records attached to the valve serial number.

03 Assembly & Functional Testing

Assembly, seat alignment, stem torque measurement, antistatic continuity check and stroke/function verification.

04 Body Strength Test

Hydrostatic shell test at 1.5x rated pressure, holding time per API 598 / API 6D, with chart or digital record.

05 Seat Leakage Test

Seat leakage test at 1.1x rated pressure, high-pressure and low-pressure sequence, zero visible leakage acceptance for soft-seated valves.

06 Torque & Actuation Test

Operating torque recorded at maximum differential pressure; actuator mounted and function tested, including fail-safe stroke and limit switch settings.

07 Coating & Cryogenic Test

Coating DFT and holiday test (or cryogenic test to -196°C for low-temperature scope), documented with batch records.

08 Third-Party Witness & Final Inspection

Witnessed testing by BV / SGS / TUV or customer inspector, final visual and marking inspection, documentation package compiled and sealed.
J-VALVES CNC machining workshop for ball valve bodies and balls
CNC machining workshop - ball valve bodies and balls
Fully welded ball valve production line in J-VALVES factory
Fully welded ball valve production line
Hydraulic pressure test bench for valves up to Class 2500
Hydraulic pressure test bench up to Class 2500
Physical and chemical laboratory for PMI and material verification
Physical & chemical laboratory - PMI and material verification
Cryogenic and fire safe ball valve testing for offshore engineering at J-VALVES laboratory
Low-temperature laboratory testing to -196°C

Standards

Standards We Design and Test To

API 6D — Pipeline and transportation valves - double block and bleed, cavity relief, weld-end capability, marking and documentation requirements.
API 607 / ISO 10497 — Fire-safe type testing of quarter-turn valves - the certification offshore HSE specifications ask for on hydrocarbon and safety systems.
ISO 15848-1 — Industrial valves - measurement, test and qualification procedures for fugitive emissions. Class and temperature range stated on our certificates.
NACE MR0175 / ISO 15156 — Materials for use in H2S-containing environments - hardness limits, material selection and welding controls for sour service.
API 598 — Valve inspection and testing - shell, seat and backseat test procedures and acceptance criteria used on every production valve.
ASME B16.34 / ISO 5211 — Wall thickness and pressure-temperature ratings; actuator mounting dimensions so third-party actuators bolt on without adapters.
EN 10204 3.1 — Material certificate type issued by our own inspection department, traceable to heat numbers and test results.

Deliverables

Documentation Package With Every Offshore Order

ITP with defined witness and hold points
EN 10204 3.1 material certificates (body, ball, stem, seat)
Dimensional inspection report
Hydrostatic shell and seat test reports
NDE reports (RT / UT / MT / PT as specified)
PMI and hardness test report
Coating DFT and holiday test report
Torque and actuator functional test record
Operation & maintenance manual and spare parts list
Seaworthy packing list with marking details

Technical Support

Talk to the Engineer Who Will Build Your Valves

Offshore enquiries are handled directly by our project engineer and sales manager, not by a call centre. Send your data sheet, valve list or specification and you will receive a technical response with a compliance/deviation list, material proposal and testing scope - usually within 24 hours on working days.


Technical response within 24 hours on working days

Compliance and deviation list before quotation

Drawings for approval in 3-5 working days after order

Third-party inspection welcomed at our plant

Two plants in Wenzhou, API 6D / API 607 / ISO 9001 certified


J-VALVES engineers inspecting large forged industrial valves during production at the Wenzhou plant, recording inspection data

FAQ

FPSO & Offshore Ball Valve FAQ

Which ball valves do you supply for FPSO projects?

For FPSO and offshore projects J-VALVES supplies API 6D trunnion mounted ball valves, DBB ball valves and actuated ball valves up to Class 2500, with NACE MR0175 sour service materials, fire-safe design to API 607 / ISO 10497 and ISO 15848-1 low-emission packing. Recent references include 18-inch Class 2500 LF2 trunnion ball valves and offshore 2500# valves with actuators.

Can you meet NACE MR0175 sour service requirements?

Do you support offshore project documentation and third-party inspection?

What is the difference between DBB and DIB ball valves?

What materials do you recommend for seawater and fire water service offshore?

How do you size actuators for offshore ball valves?

What is the typical lead time for offshore ball valves?

Can you supply valves with classification society or operator-specific specifications?

Get a Factory Quote

Send your specification, valve list or drawing set - technical proposal and quotation within 24 hours on working days.
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