GNG High-Pressure Fire-Resistant BOP Control Hose Assembly

Description

Goldenman GNG High-Pressure Fire-Resistant and Heat-Insulated Hose Assembly is designed for hydraulic power-fluid transmission within drilling well-control systems.

The hose can be installed between the BOP control unit, hydraulic control manifold and BOP operating components where flexible routing, high-pressure resistance and fire protection are required.

Available nominal inside diameters range from 19 to 38 mm, with 35 MPa and 70 MPa working-pressure configurations. Depending on the selected pressure class and size, the listed minimum burst pressure is 105 MPa or 175 MPa.

Three external protection configurations are available:

• High-molecular polymer protective jacket
• Stainless-steel armored jacket
• Braided stainless-steel wire jacket

The assembly is supplied with project-specific end connections, pressure-test documentation and applicable API certification documentation according to the agreed order scope.

Product Highlights

• Designed for BOP hydraulic control systems
• 19–38 mm nominal inside diameter
• 35 MPa and 70 MPa pressure classes
• Minimum burst pressure up to 175 MPa
• Fire-resistant performance at 750°C
• Page-listed normal fire exposure time of 5 minutes
• Page-listed limiting exposure time up to 25 minutes
• NPT or LP threaded connection options
• Minimum bend radius from 280 to 560 mm
• Polymer, stainless-steel armored or braided jacket options
• Flexible connection between control equipment and BOP components
• Pressure testing and inspection documentation available
• Replacement hose dimensional matching support

What Is a BOP Control Hose?

A BOP control hose is a high-pressure hydraulic hose assembly used to transmit control fluid from a BOP control unit or manifold to hydraulically operated well-control equipment.

Depending on the control-system arrangement, it may supply hydraulic pressure to:

• Annular BOP opening and closing circuits
• Ram BOP opening and closing circuits
• Hydraulic connectors
• Choke and kill valve actuators
• Diverter control functions
• Other auxiliary well-control equipment

The hose carries hydraulic control fluid rather than drilling mud or uncontrolled well fluid.

Its main function is to maintain a reliable hydraulic connection while accommodating equipment movement, installation tolerances, vibration and routing limitations.

BOP Control Hose vs Other Oilfield Hoses

API’s product-scope documentation distinguishes API 7K high-pressure mud and cement hoses, API 16C flexible choke and kill lines, and API 16D well-control system products. These products should not be treated as interchangeable.

Main Applications

The GNG fire-resistant control hose can be used for:

• Land drilling-rig BOP control systems
• Surface-mounted BOP stacks
• BOP hydraulic control manifolds
• Remote BOP control lines
• Annular BOP control circuits
• Ram BOP control circuits
• Hydraulic choke and kill valve control
• Diverter control equipment
• Well-control equipment refurbishment
• Replacement of rigid hydraulic piping where flexibility is required
• High-temperature and fire-risk hydraulic transmission locations

The hose should not be used as a rotary drilling mud hose or choke and kill flowline unless it is separately designed, qualified and documented for that service.

General Technical Specifications

Size and Pressure Specifications

The original page combines the 35 MPa and 70 MPa versions within one compressed table. The data can be reorganized as follows.

The exact outside diameter may vary with pressure class, reinforcement design and jacket configuration. Final dimensions must be confirmed in the approved hose datasheet.

Hose Jacket Configurations

High-Molecular Polymer Jacket

The polymer-jacket version uses an external protective polymer layer over the hose reinforcement.

It may be selected where the project requires:

• Flexible routing
• External abrasion protection
• Resistance to routine weather exposure
• Lower external metallic content
• Easier handling than a fully armored configuration

The exact polymer material and fire-protection construction should be confirmed in the approved datasheet.

Stainless-Steel Armored Jacket

The armored configuration uses an external stainless-steel protective structure.

It may be selected where the hose is exposed to:

• Mechanical impact
• Falling tools or rig-floor damage
• High radiant heat
• Sharp-edge contact
• Severe external wear
• Offshore or harsh environmental conditions

The armored layer does not remove the need to observe the specified minimum bend radius.

Braided Stainless-Steel Wire Jacket

A braided stainless-steel wire jacket provides external mechanical reinforcement while retaining greater routing flexibility than some rigid armored structures.

Selection should consider:

• Hose movement
• Routing complexity
• External abrasion
• Required flexibility
• Corrosion environment
• Fire-protection requirement

The jacket type should be stated clearly in the request for quotation because it affects outside diameter, weight, flexibility and installation method.

How to Select the Correct BOP Control Hose

1. Select the Working-Pressure Class

The hose working-pressure rating must be compatible with:

• BOP control-system operating pressure
• Maximum hydraulic pump pressure
• Accumulator precharge and working pressure
• Pressure regulator settings
• Expected pressure surges
• Control-manifold pressure rating
• End-fitting pressure rating

The buyer should not select a 35 MPa or 70 MPa hose using only the BOP’s wellbore pressure rating.

The BOP wellbore pressure and hydraulic operating pressure are different specifications.

2. Determine the Required Inside Diameter

The hose ID affects:

• Hydraulic flow capacity
• Pressure loss
• BOP opening and closing response
• Required fluid volume
• Long-distance control-line performance
• Compatibility with valves and manifold passages

An undersized hose can restrict hydraulic flow and increase operating time, particularly on large Annular BOPs or functions with high operating-fluid volume.

A larger hose does not automatically improve performance if the control valves, fittings or BOP ports remain restrictive.

3. Confirm the Required Length

The hose should be long enough to accommodate:

• Distance between the control manifold and BOP
• Equipment movement
• Rig vibration
• Installation tolerances
• Safe routing around other equipment
• Required bend radius
• Maintenance access

Excessive length can increase pressure loss, response time, weight and installation complexity.

For replacement orders, the hose should be measured along its installed routing rather than only from straight-line distance.

4. Observe the Minimum Bend Radius

The specified minimum bend radius must be maintained during installation and operation.

Bending the hose too tightly can cause:

• Reinforcement damage
• Internal tube deformation
• Reduced flow area
• Localized stress at the end fitting
• Premature leakage
• Reduced burst resistance
• Shortened service life

Bend radius should be checked at both static routing points and locations subject to equipment movement.

5. Match the End Connections

The page lists NPT and LP connection options.

Before ordering, confirm:

• Thread type
• Nominal thread size
• Male or female end
• Connection material
• End orientation
• Straight or elbow fitting
• Swivel requirement
• Sealing method
• Mating manifold or BOP port

NPT and LP connections should not be assumed interchangeable merely because their nominal size appears similar.

6. Select the Required Fire Protection

The required fire-resistance level should be based on:

• Hose location
• Distance from potential ignition sources
• Rig fire-risk analysis
• Emergency shutdown philosophy
• Required operating duration during fire exposure
• Onshore or offshore project specification
• End-user test requirements

The original page lists operation at 750°C for 5 minutes under the normal criterion and up to 25 minutes as a limiting value. The final order should define the required test method, pressure during exposure and acceptance criteria.

7. Confirm Hydraulic-Fluid Compatibility

The purchaser should specify:

• Hydraulic oil type
• Operating temperature
• Additive package
• Water-glycol or alternative control fluid
• Expected contamination
• Storage and ambient temperature

The inner tube, seals and end-fitting materials must be compatible with the selected control fluid.

Connecting the Hose Between the Manifold and BOP

A BOP control hose may be installed between the hydraulic control manifold and the relevant BOP operating port.

Before installation, verify:

• Manifold outlet function
• BOP opening or closing port
• Hydraulic schematic
• Hose pressure class
• Correct hose ID
• Connection thread and seal
• Routing direction
• Minimum bend radius
• Hose identification
• Protection against heat and mechanical damage

Opening and closing hoses should be clearly identified to prevent reversed connections.

The control schematic, hose tags and manifold-panel markings should use the same function names.

Replacement Hose Compatibility

A replacement hose should not be ordered using only its nominal ID and working pressure.

For direct replacement, confirm:

• Existing hose manufacturer
• Hose model
• Nominal ID
• Actual hose OD
• Working pressure
• Minimum burst pressure
• Overall length
• End-to-end length
• End connections
• Male or female orientation
• Straight or elbow ends
• Jacket type
• Minimum bend radius
• Fire-resistance requirement
• Hydraulic fluid
• Existing hose markings

Clear photographs of both end fittings and the full hose routing are recommended.

Procurement Considerations

Pressure Rating of the Complete Assembly

The allowable working pressure of the complete assembly is limited by its lowest-rated component.

The buyer should confirm the rating of:

• Hose body
• End fittings
• Threaded adapters
• Elbows
• Swivels
• Manifold ports
• BOP operating ports
• Isolation valves

A high-pressure hose body does not make a lower-rated fitting suitable for the same pressure.

Hose Routing and Mechanical Protection

The hose should be protected from:

• Sharp bends
• Crushing
• Tension loading
• Vehicle traffic
• Falling objects
• Weld spatter
• Direct flame exposure beyond its qualification
• Contact with hot exhaust surfaces
• Abrasion against structural steel

Clamps and supports should not locally crush or restrict the hose.

Fire-Test Documentation

For critical well-control applications, the order should define whether the customer requires:

• Type-test report
• Batch-specific test record
• Fire-test certificate
• Test temperature
• Test duration
• Internal test pressure
• Post-fire leakage acceptance
• Third-party witness

A general statement of “fire resistant” is not sufficient when the end user has a defined test procedure.

Manufacturing and Quality Control

Goldenman can supply the hose assembly with a documented inspection scope that may include:

• Raw-material verification
• Inner-tube inspection
• Reinforcement-layer inspection
• Fire-resistant insulation inspection
• External jacket inspection
• End-fitting material verification
• Connection dimensional inspection
• Hose-length inspection
• Assembly and end-fitting inspection
• Proof-pressure testing
• Leakage inspection
• Pressure-holding test
• Bore and flow-path inspection
• Product-marking verification
• Fire-test documentation review
• Final visual inspection
• Packaging and preservation inspection

Destructive burst and fire tests are normally qualification or sample tests unless the purchase specification requires a different inspection plan.

Available Documentation

The documentation package can include:

• Applicable API certificate
• Certificate of Conformity
• Approved product datasheet
• Hose assembly drawing
• End-connection drawing
• Material certificates for metallic fittings
• Dimensional inspection report
• Proof-pressure test report
• Leakage test record
• Burst-test qualification report
• Fire-resistance test report
• Hydraulic-fluid compatibility information
• Product identification and traceability record
• Installation and inspection instructions
• Packing list
• Third-party inspection report when ordered

Frequently Asked Questions

Is this hose the same as an API 7K rotary drilling hose?

No.

A rotary drilling hose carries high-pressure drilling mud or cement between the standpipe and swivel or top drive. The GNG BOP control hose carries hydraulic control fluid used to operate well-control equipment.

The two products have different media, dimensions, end connections, operating functions and qualification requirements.

Can this hose be used as an API 16C choke and kill hose?

Not unless it has been separately designed, qualified and documented as an API 16C flexible choke or kill line.

A choke and kill hose may be exposed directly to well fluids, gas, abrasive solids and high-pressure flow. A BOP control hose normally carries clean hydraulic control fluid.

How should 35 MPa and 70 MPa versions be selected?

Selection should be based on the maximum hydraulic control-system pressure, expected pressure surges and the ratings of the manifold, BOP ports and fittings.

The 70 MPa version also has a larger listed outside diameter and higher minimum burst-pressure requirement than the corresponding 35 MPa configuration.

How does hose inside diameter affect BOP closing time?

A smaller ID creates greater hydraulic-flow restriction, particularly over long hose lengths.

If the BOP function requires a large fluid volume, an undersized or excessively long control hose can increase opening or closing time. Hose ID should therefore be evaluated with control-valve capacity, operating pressure and BOP operating volume.

Can a larger-ID hose always improve BOP response time?

No.

The control manifold valve, fittings, connectors and BOP port may remain the limiting restrictions. A larger hose also increases weight, outside diameter and minimum bend radius.

The full hydraulic circuit should be reviewed rather than changing hose size alone.

Why is the minimum bend radius important?

The minimum bend radius protects the inner tube and reinforcement from excessive local stress.

Installing the hose below its stated bend radius can restrict flow, damage reinforcement, reduce pressure capacity and cause premature failure near the end fittings.

Can the hose connect directly between the control manifold and the BOP?

Yes, when the pressure rating, hose ID, length, end connections, hydraulic-fluid compatibility and fire-protection requirements match both interfaces.

The hydraulic schematic must also confirm that the hose is connected to the correct BOP opening or closing function.

What does the listed 750°C fire-resistance time mean?

The original product data lists 5 minutes as the normal operating time under 750°C fire exposure and up to 25 minutes as a limiting value.

The customer should verify the applicable test procedure, internal pressure, acceptance criteria and whether the figure represents a type-test result or a project-specific requirement.

Does API 16D certify the individual hose assembly?

API 16D applies to control systems for drilling well-control and diverter equipment. API’s current Monogram licensing form lists complete control-system categories rather than standalone hose assemblies.

The purchase order should therefore state the precise API certificate scope, the hose’s compliance basis and the required pressure and fire-test documentation.

What information is required to replace an existing BOP control hose?

Provide the hose ID, working pressure, length, end connections, fitting orientation, jacket type, bend radius, hydraulic fluid and fire-resistance requirement.

Photographs of the markings, end fittings and installed routing are strongly recommended.

Information Required for Quotation

Please provide:

• Required nominal inside diameter
• Required working pressure
• Maximum system pressure
• Hose overall length
• End-to-end fitting length
• End connection at side A
• End connection at side B
• Male or female thread orientation
• Straight or elbow fitting requirement
• NPT or LP thread
• Jacket type
• Minimum bend radius limitation
• Hydraulic control-fluid type
• Operating temperature
• Ambient temperature
• Required fire-test temperature
• Required fire-exposure duration
• BOP control-unit model
• Connected manifold function
• Connected BOP model and function
• API certificate requirement
• Pressure-test documentation
• Fire-test documentation
• Third-party inspection requirement
• Quantity
• Destination country
• Required delivery schedule

For replacement orders, also provide the existing hose marking, photographs and installed routing dimensions.

Request a Technical Quotation

Goldenman supplies GNG high-pressure fire-resistant BOP control hose assemblies for land and offshore well-control systems.

Available sizes range from 19 to 38 mm nominal ID, with 35 MPa and 70 MPa pressure configurations and multiple protective-jacket options.

Send your hose ID, working pressure, length, end connections, jacket type and fire-test requirements to:

Email: info@goldenman.com

Goldenman will review the control-system interfaces and prepare the appropriate hose specification, inspection documentation and commercial quotation.