Grooved · Mechanical · Threaded
Pipe Connectors & Couplings
Pipe connectors for grooved, threaded and repair connections, selected by actual pipe diameter, seal compatibility and service duty.
Specification basis
Confirm the applicable drawing and requirements
Inspection scope
Defined against the approved order
Category Pipe Connectors & Couplings Grooved · Mechanical · Threaded Measure the real pipe
OD
Specification input
State medium and temperature
Fluid
Specification input
About this range
Specify the connection, then the coupling
Pipe connectors join straight runs, form branches and create removable interfaces with valves or equipment. JINYI’s range includes grooved pipe couplings, grooved elbows and tees, flange adapters, repair couplings and threaded unions. Selection starts with the actual pipe outside diameter and end preparation, followed by working pressure, temperature, fluid and the required restraint. A nominal size alone does not establish compatibility. Use this category to compare connection systems; use the individual product pages for the configuration offered, dimensional schedule and quotation details.
- Measure the actual pipe OD in millimetres, including ovality and the coating condition at the sealing area. DN and NPS are nominal designations, not direct OD measurements.
- For grooved pipe couplings, identify the groove system, roll or cut preparation, groove diameter and width, gasket seat and permissible end flare.
- Choose rigid or flexible behaviour explicitly. A flexible coupling permits only its documented movement and deflection; it is not a universal expansion joint.
- Match gasket compound to the complete fluid composition and temperature range. Include cleaning chemicals, oil contamination and any potable-water approval requirement.
- For pipe repair couplings, state the defect length, pipe material, measured OD range, available straight length and whether axial restraint is required.
- For threaded unions, identify NPT or the exact BSP thread specification. Similar nominal sizes do not make tapered and parallel thread systems interchangeable.
Featured pipe connectors & couplings
Selected pipe connectors & couplings for project enquiries. Compare the connection, installation and specification details, then request a quotation for your required configuration.
See the full catalogueA grooved pipe coupling joins two compatible grooved pipe ends using a gasket and bolted housing. Specify dimensions, material and service conditions for a Jinyi quotation.
Grooved Pipe Coupling
View detailsA pipe repair coupling encloses a specified pipe area with a bolted shell and sealing liner. Specify dimensions, material and service conditions for a Jinyi quotation.
Pipe Repair Coupling
View detailsA grooved flange adapter connects a specified grooved piping end to a bolted flange interface. Specify dimensions, material and service conditions for a Jinyi quotation.
Grooved Flange Adapter
View detailsA grooved equal tee forms a three-way junction with equal nominal connection sizes on the run and branch. Specify dimensions, material and service conditions for a…
Grooved Equal Tee
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A grooved 90 degree elbow changes the direction of a compatible grooved pipeline through a right-angle fitting. Specify dimensions, material and service conditions for a Jinyi…
Grooved 90 Degree Elbow
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A mechanical tee outlet provides a branch outlet using a split housing fitted around the specified main pipe. Specify dimensions, material and service conditions for a…
Mechanical Tee Outlet
View detailsPipe Connectors & Couplings catalogue
Browse 13 products in this category. Search the range or compare the available enquiry options. Final materials, dimensions and ratings are confirmed against the selected product and your specification.
Showing 1–13 of 13 products
A grooved 45 degree elbow provides a 45-degree direction change in a specified grooved pipe arrangement. Specify dimensions, material and service conditions for a Jinyi quotation.
Grooved 45 Degree Elbow
View detailsA grooved 90 degree elbow changes the direction of a compatible grooved pipeline through a right-angle fitting. Specify dimensions, material and service conditions for a Jinyi…
Grooved 90 Degree Elbow
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A grooved cross creates a four-way junction with a main run and opposing branch connections. Specify dimensions, material and service conditions for a Jinyi quotation.
Grooved Cross
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A grooved end cap closes the end of a compatible grooved pipeline with a solid cap. Specify dimensions, material and service conditions for a Jinyi quotation.
Grooved End Cap
View detailsA grooved equal tee forms a three-way junction with equal nominal connection sizes on the run and branch. Specify dimensions, material and service conditions for a…
Grooved Equal Tee
View detailsA grooved flange adapter connects a specified grooved piping end to a bolted flange interface. Specify dimensions, material and service conditions for a Jinyi quotation.
Grooved Flange Adapter
View detailsA grooved pipe coupling joins two compatible grooved pipe ends using a gasket and bolted housing. Specify dimensions, material and service conditions for a Jinyi quotation.
Grooved Pipe Coupling
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A grooved reducer transitions between two specified grooved connection sizes. Specify dimensions, material and service conditions for a Jinyi quotation.
Grooved Reducer
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A grooved reducing tee connects a smaller branch to the main run of a compatible grooved pipeline. Specify dimensions, material and service conditions for a Jinyi…
Grooved Reducing Tee
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A grooved wye provides a Y-shaped branch arrangement for a specified grooved piping layout. Specify dimensions, material and service conditions for a Jinyi quotation.
Grooved Wye
View detailsA mechanical tee outlet provides a branch outlet using a split housing fitted around the specified main pipe. Specify dimensions, material and service conditions for a…
Mechanical Tee Outlet
View detailsA pipe repair coupling encloses a specified pipe area with a bolted shell and sealing liner. Specify dimensions, material and service conditions for a Jinyi quotation.
Pipe Repair Coupling
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A threaded pipe union provides a separable connection between two specified threaded pipe ends. Specify dimensions, material and service conditions for a Jinyi quotation.
Threaded Pipe Union
View detailsProduct capabilities
Connection geometry and sealing control
Grooved pipe connectors for industrial piping need an agreed interface drawing before a pressure or movement claim can be accepted. Housing keys, the pipe groove and the gasket seat form one connection system. Repair sleeves use a different sealing geometry and may need separate restraint. Mechanical pipe couplings for water pipelines also require consideration of surge pressure, buried exposure, corrosion protection and access for bolt tightening. Supply the mating-pipe details with the enquiry so the proposed connection can be checked as an assembly.
- Movement: Rigid or rated flexibility
- Gasket: Compound + temperature
- Pressure basis: Working + surge + vacuum
- Restraint: State axial-force duty
Specification
Fit basis
OD
Measure the real pipe
Seal choice
Fluid
State medium and temperature
Four checks before specifying pipe connectors
Use these checks to define the pipe connectors assembly before comparing prices. Record the decision against the drawing revision and obtain confirmation of the proposed model’s limits.
- Identify the interface Record actual OD, wall thickness, end condition and the required grooved, plain-end or threaded connection.
- Define the sealing duty List fluid, concentration, operating and design temperatures, working pressure, surge and vacuum exposure.
- Check movement and restraint Provide axial force, permitted deflection, support spacing and any settlement or thermal movement at the joint.
- Agree the assembly details Confirm housing, gasket and fastener references, coating, tightening instructions and the inspection record.
Dimensions and service conditions should be agreed before ordering.
Mechanical pipe couplings for water pipelines
For pipe connectors, send the pipe material, actual OD, wall thickness, connection type, fluid, pressure and temperature. Add groove or flange drawings, required movement, restraint duty and quantity so the quotation identifies the complete housing, gasket and fastener combination.
- Existing pipework A field measurement sheet should include OD at several positions, surface damage and remaining straight sealing length.
- Branch connections State run and branch sizes, outlet orientation, hole-cut dimensions where applicable and branch support requirements.
- Valve interfaces For a flange adapter, supply flange standard, nominal size, pressure designation, facing and bolt-hole pattern.
- Procurement package Include quantities by connection type, spare gasket needs, installation sequence and the required delivery location.
Send drawings and the item schedule with your enquiry.
Inspection requirements for pipe connectors
A connector inspection plan should verify the dimensions that determine fit and the materials that determine sealing performance. Specify acceptance criteria on the purchase order; a pressure rating for one housing, gasket and pipe combination cannot automatically be transferred to another.
Inspection checklist
Specify in the order- Pipe-end measurementOD, ovality, groove geometry and gasket-seat surface condition.
- Housing and fastenersCasting or fabrication identity, key profile, bolt size and matching nuts.
- Elastomer identificationCompound, size and documented compatibility with the stated medium.
- Fit and installationEnd gap, housing seating and tightening method from the selected model instructions.
- Testing scopeAgree leak or pressure testing and any third-party witness points before supply.
Order documentation
Scope to confirm- Approved drawingDimensions, revision and acceptance criteria
- Material recordSpecify traceability and document type
- Inspection reportAgree measured items and test scope
- Project approvalsConfirm any required certificates before ordering
Quality
Inspection · gauging
Standards · documents
Review checkpoints
Document control
Six inspection planning steps
A purchase-order checklist- 1
Drawing review
Confirm the specification, revision and the selected pipe connectors configuration.
- 2
Pipe-end measurement
OD, ovality, groove geometry and gasket-seat surface condition.
- 3
Housing and fasteners
Casting or fabrication identity, key profile, bolt size and matching nuts.
- 4
Elastomer identification
Compound, size and documented compatibility with the stated medium.
- 5
Fit and installation
End gap, housing seating and tightening method from the selected model instructions.
- 6
Testing scope
Agree leak or pressure testing and any third-party witness points before supply.
Applications and specification priorities
Common application contexts for pipe connectors. Each installation needs a service-specific selection; the entries below describe engineering priorities, not customer projects or approvals.
Technical selection and common questions
Grooved connection principles
Read the reference scope
Confirm applicability to your selected designRigid and flexible couplings
Read the reference scope
Confirm applicability to your selected designJINYI technical help
Read the reference scope
Confirm applicability to your selected design
Dimension schedule
Record these fields on a drawing or item schedule. Each quotation for pipe connectors should identify the proposed configuration and any departure from the specified interface.
Discuss your specification
Service and installation
Include these conditions with the pipe connectors enquiry. A useful comparison checks technical compliance, inspection scope and installation requirements before comparing unit price.
Discuss your specificationQ&AAnswers for pipe connectors
Selection questions
Can a grooved coupling replace a repair sleeve?
Not by size alone. A grooved coupling requires compatible prepared ends; a repair sleeve seals a defined length of existing pipe. Select the connection for the actual pipe condition and required axial restraint.
Does flexible mean unrestricted movement?
No. Obtain the selected coupling’s axial and angular limits. Thermal movement, settlement and pressure thrust must be checked together with anchors and supports.
Need help with a specific drawing? Include the service conditions in your enquiry.
Discuss your specificationQ&AAnswers for pipe connectors
Installation questions
What information prevents a wrong gasket?
State the fluid name, concentration, temperature limits and cleaning process. A gasket described only as rubber is insufficient for a reliable selection.
How should mixed pipe materials be joined?
Provide each pipe’s actual OD, material, stiffness and end preparation. The proposed coupling must explicitly accommodate both ends and the project’s restraint and corrosion requirements.
Need help with a specific drawing? Include the service conditions in your enquiry.
Discuss your specificationRelated products for your assembly
Explore complementary products from other JINYI categories. Check each product’s dimensions and connection requirements against your assembly drawing.
See the full catalogue
- Nominal size
- 4 in / DN100
- Pressure designation
- Class 150
- Outside diameter
- 228.6 mm
- Flange thickness
- 22.35 mm
Weld Neck Flange
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- Nominal size
- DN100 / 4 in
- Face-to-face length
- 150 mm
- Axial extension
- 10 mm
- Axial compression
- 19 mm
Rubber Expansion Joint
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- Nominal pipe size
- 4 in
- Support height H
- 101.6 mm
- Support length L
- 304.8 mm
- Axial movement allowance
- 101.6 mm
Insulated Pipe Support
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- Nominal size
- 4 in / DN100
- Pipe outside diameter
- 114.3 mm
- Bend angle
- 90°
- Centreline radius
- 152.4 mm
90 Degree Pipe Elbow
View detailsRequest a pipe connectors quotation
For pipe connectors, send the pipe material, actual OD, wall thickness, connection type, fluid, pressure and temperature. Add groove or flange drawings, required movement, restraint duty and quantity so the quotation identifies the complete housing, gasket and fastener combination.
Attach the approved drawing, item schedule and service conditions. Identify mandatory documents, inspection hold points and delivery requirements when requesting a quotation.
- Drawing-based review
- Service-specific selection
- Inspection scope agreed