Description
Flow Iron Pup Joint and Rigid Straight Pipe Product Scope
GPEPUMP uses “Flow Iron Pup Joint” for short pressure-rated straight-pipe assemblies used within high-pressure Flow Iron systems. “Rigid Straight Pipe Assembly” is the broader product family and may include hammer-union, threaded, welded or flanged end configurations.
| Product Type | Main Configuration | Typical Purchasing Basis |
|---|---|---|
| Flow Iron Pup Joint | Short high-pressure straight pipe with Flow Iron connections | Size + pressure + figure + length |
| Integral Pup Joint | Integral high-pressure end configuration | Drawing / part number + pressure + length |
| NPST Pup Joint | NPST union-end configuration | Drawing / existing assembly data |
| Rigid Straight Pipe Assembly | Union, threaded, welded or flanged straight pipe | Project drawing + end connections + pressure |
Main Technical Specifications
| Parameter | GPEPUMP Manufacturing Range |
|---|---|
| Product | Flow Iron Pup Joint / High-Pressure Rigid Straight Pipe Assembly |
| Alternative names | Pup Joint / Flow Iron Straight Pipe / Straight Pipe Assembly |
| Product category | High-Pressure Flow Iron |
| Nominal sizes | 1–6 in |
| Working pressure | 2,000–20,000 psi |
| Metric pressure range | 14–140 MPa |
| Pressure series | 2K, 3K, 5K, 6K, 10K, 15K and 20K |
| Operating temperature | Confirmed according to service condition, pressure configuration, sealing system and approved drawing |
| Low-temperature service | Available according to approved material and seal configuration |
| Service class | Standard / Low Temperature / Sour Service as specified |
| Standard lengths | 2, 3, 4, 5, 6, 8, 10, 12 and 20 ft |
| Custom length | According to approved drawing |
| Body construction | High-strength pressure pipe with forged end connections |
| Flow path | Straight, full-flow or drawing-controlled bore |
| End connections | Hammer Union, thread, butt weld or API flange |
| Union options | Fig 602, Fig 1002, Fig 1502, Fig 2002 and Fig 2202 |
| End combinations | M × M, M × F and F × F |
| Service environment | Standard, Low Temperature or H₂S Service |
| Main applications | Fracturing, cementing, acidizing, testing, circulation and flowback |
| H₂S material selection | NACE MR0175 / ISO 15156 |
| Inspection | Dimensional, material and specified NDE/testing according to the approved inspection requirement |
| Pressure testing | Hydrostatic testing according to the approved product configuration and inspection requirement |
| Supply scope | Complete pipe assembly, union seals, protectors and documentation |
Flow Iron Pup Joint Sizes, Pressure Ratings and Lengths
This table summarizes the published GPEPUMP product range. The approved drawing controls the final bore, pressure class, wall thickness, connection and end-to-end length.
| Nominal Size | Typical Union Family | Typical Working Pressure | Standard Length Range |
|---|---|---|---|
| 1 in | Fig 1502 | Up to 15,000 psi | 2–12 ft |
| 1-1/2 in | Fig 1502 | Up to 15,000 psi | 2–12 ft |
| 2 in | Fig 602 / 1002 / 1502 / 2002 / 2202 | 6,000–20,000 psi | 2–20 ft |
| 3 in | Fig 602 / 1002 / 1502 / 2002 / 2202 | 6,000–20,000 psi | 2–20 ft |
| 4 in | Fig 602 / 1002 / 1502 | 6,000–15,000 psi | 2–20 ft |
| 5–6 in | Engineered connection | Project-specific | Custom |
Flow Iron Pup Joint Construction Options
Integral Pup Joint
GPEPUMP supplies integral Pup Joint configurations for high-pressure Flow Iron systems. Size, pressure, union figure, bore, end arrangement and overall length are confirmed against the approved drawing before production.
NPST Pup Joint
NPST Pup Joints are supplied when the existing equipment, replacement requirement or project specification calls for an NPST configuration. For replacement orders, send the current part number, drawing or measured connection data for confirmation.
Other Straight Pipe Assemblies
GPEPUMP also manufactures retention-shoulder, threaded, butt-weld and flanged straight pipe assemblies for compatible pressure-control, manifold and skid layouts.
- Threaded and butt-weld ends
- Flanged straight pipe assemblies
- Replacement-compatible dimensions
Choose a Pup Joint Construction
Select the construction together with the required size, pressure, connection, length, bore, end arrangement and service condition. For replacement work, existing drawings or part numbers help GPEPUMP confirm the configuration faster.
| Construction | When to Specify | Information to Send |
|---|---|---|
| Integral Pup Joint | When an integral high-pressure end configuration is required | Size, pressure, union figure, length, end arrangement, drawing |
| NPST Pup Joint | When the existing assembly or project specification requires an NPST configuration | Size, pressure, connection, length, bore, drawing or part number |
| Other Straight Pipe Assembly | For threaded, butt-welded or flanged straight-pipe layouts | Connection type, pressure, dimensions and drawing |
Flow Iron Connection & Pressure Families
| Connection Family | Service Reference | Typical Use |
|---|---|---|
| Fig 602 | Pressure rating according to approved configuration | Cementing, circulation and well-service systems |
| Fig 1002 | Pressure rating according to approved configuration | Cementing, acidizing, testing and well service |
| Fig 1502 | Common high-pressure Flow Iron connection | Hydraulic fracturing and pressure-pumping systems |
| Fig 2002 | Engineered ultra-high-pressure configuration | High-pressure pumping and test systems |
| Fig 2202 | Sour-service / H₂S configuration where specified | Sour-service Flow Iron systems |
Union figure alone does not define the complete working-pressure rating. Final pressure capability depends on nominal size, connection configuration, service condition, material, seal system and the approved drawing.
Service Conditions
| Service | Published GPEPUMP Configuration |
|---|---|
| Standard Service | Compatible non-sour fracturing, cementing, circulation, testing and flowback fluids within the approved assembly specification. |
| Low-Temperature Service | Available for project-specific low-temperature requirements, subject to material, seal and approved documentation confirmation. Certain configurations can be supplied for service down to -46°C when specified on the approved project documentation. |
| H₂S / Sour Service | Controlled-hardness pressure materials, qualified heat treatment, sour-service connection/seal selection and NACE MR0175 / ISO 15156 material selection where applicable. |
Applications
| Application | Typical System Position |
|---|---|
| Hydraulic Fracturing | Frac pumps, pump discharge manifolds, plug valves, check valves, swivel joints, frac manifolds and wellhead-side Flow Iron |
| Cementing | Cementing units, high-pressure pumps, cementing manifolds, cement heads, circulating heads and flush lines |
| Acidizing | High-pressure treatment lines using material and sealing systems selected for the approved service condition |
| Well Testing / Flowback | Temporary high-pressure flowlines and test packages exposed to formation fluids, solids and pressure cycling |
Manufacturing, Inspection & Pressure Testing
GPEPUMP manufactures Flow Iron Pup Joints against the confirmed purchase specification and approved drawing. Inspection and testing are defined according to the product configuration, pressure class, service condition and agreed inspection requirements.
- Raw-material certificate and heat-number verification
- Dimensional, bore and connection inspection
- UT / MPI / hardness verification where specified
- Hydrostatic testing according to the approved inspection requirement
- Product marking and traceability
- Required inspection and test documentation
Inspection & Documentation Available for Confirmed Orders
Documentation scope is confirmed with the purchase order and applicable inspection requirements.
Product & Drawing
- Product datasheet
- GA drawing
- Dimensional drawing
- Connection schedule
Material & Inspection
- Material Test Certificates
- Heat-treatment records
- Hardness / NDE reports
- Dimensional inspection report
Testing & Traceability
- Hydrostatic pressure-test report
- Serial-number traceability
- Certificate of Conformity
- Packing documentation
What Information Is Required for Selection and RFQ?
A nominal size alone does not define a Flow Iron Pup Joint. Send the following information so GPEPUMP can confirm the complete pressure-rated configuration before quotation.
| Required Information | Typical Input |
|---|---|
| Nominal size | 1 in, 2 in, 3 in, 4 in, etc. |
| Working pressure | 6K / 10K / 15K / 20K |
| Union / connection | Fig 602 / 1002 / 1502 / 2002 / 2202 |
| Construction | Integral / NPST / threaded / butt-weld / flanged |
| End-to-end length | Standard length or drawing-controlled custom length |
| End arrangement | M × M / M × F / F × F |
| Bore / wall requirement | Existing drawing, measured data or approved project requirement |
| Service condition | Standard / Low Temperature / H₂S |
| Existing reference | Part number, GA drawing, connection schedule or sample data |
| Quantity & documentation | Order quantity and required inspection / test documents |
Related High-Pressure Flow Iron Products
Frequently Asked Questions
What is a Flow Iron Pup Joint?
A Flow Iron Pup Joint is a short high-pressure rigid straight pipe assembly used to connect pressure-control and treatment-line components across a defined distance while maintaining the required bore, pressure class and connection geometry.
What sizes and standard lengths does GPEPUMP supply?
The current published manufacturing range covers nominal sizes from 1 to 6 in. Published standard lengths include 2, 3, 4, 5, 6, 8, 10, 12 and 20 ft, while final availability depends on the selected configuration and approved drawing.
What working pressures are available?
The published GPEPUMP range covers 2,000 to 20,000 psi / 14 to 140 MPa, depending on nominal size, connection family, construction, service condition and approved drawing.
Do you supply both Integral and NPST Pup Joints?
Yes. GPEPUMP supplies Integral and NPST Pup Joint configurations according to the required size, pressure, connection, length, service condition and approved drawing. For replacement orders, send the existing drawing or part number for configuration matching.
Can GPEPUMP supply sour-service Pup Joints?
GPEPUMP can supply sour-service configurations when specified. Material selection, hardness control, sealing system and inspection requirements are confirmed according to the approved product configuration and applicable project requirements.
What information should I send for a quotation?
Send the nominal size, working pressure, connection figure, construction type, required length, end arrangement, bore, service condition, quantity and any existing drawing, part number or measured data.
Request a Flow Iron Pup Joint Technical Proposal
Send GPEPUMP the required size, pressure, length, connection, construction, service condition and quantity. For replacement work, include the existing part number, GA drawing, connection schedule or measured dimensions.
Email: info@gpepump.com
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