Description
DEENPU Integral Fittings are robust, one-piece components forged from high-strength alloy steel, designed to connect and direct flow in high-pressure piping systems. Their seamless construction eliminates the inherent weak points of welded or threaded fittings, making them a cornerstone of safety and reliability in demanding oil and gas operations such as hydraulic fracturing, cementing, wellhead testing, and stimulation services.
Available in 2″, 3″, and 4″ sizes with Figure 1502, Figure 1002, and Figure 602 hammer union end connections, DEENPU integral fittings cover the full range of high-pressure manifold building blocks: elbows, tees, crosses, wyes, laterals, and pup joints. Each fitting is forged from AISI 4130/4140 alloy steel, heat-treated for maximum durability, and pressure-tested before shipment.
Key Features
- One-piece forged construction — no welds, no weak points
- High-strength alloy steel (AISI 4130/4140) with heat treatment
- Larger wall thickness at connection for extended service life
- Leading chamfered bore reduces turbulence and erosion
- Removable retainer ring allows field replacement of wing nuts
- Compatible with all major hammer union brands (Weco, FMC, Chiksan)
- NACE MR0175 compliant materials available for sour service
- Pressure tested to maximum working pressure before shipment
- Quick-connect hammer union ends for fast rig-up/rig-down
- Comprehensive configuration range — elbows, tees, crosses, wyes, laterals, pup joints
Technical Specifications
| Parameter | Specification |
|---|---|
| Design Standard | API 16C / ISO 13678 |
| Nominal Sizes | 2″, 3″, 4″ |
| Figure Connections | Fig 1502, Fig 1002, Fig 602 (Weco standard) |
| Working Pressure | 6,000 psi to 15,000 psi (figure dependent) |
| Temperature Rating | -46°C to +121°C (-51°F to +250°F), Class L through U |
| Service | Standard, Sour Gas (NACE MR0175) |
| Material | AISI 4130 / 4140 high-strength alloy steel (forged) |
| Heat Treatment | Quenched and tempered |
| Configuration Range | Elbows, Tees, Crosses, Wyes, Laterals, Pup Joints, Crowfoot Crosses |
Working Pressure by Figure & Size
| Figure | 2″ | 3″ | 4″ |
|---|---|---|---|
| Fig 1502 | 15,000 psi | 15,000 psi | 15,000 psi |
| Fig 1002 | 10,000 psi | 10,000 psi | 10,000 psi |
| Fig 602 | 6,000 psi | 6,000 psi | 6,000 psi |
Available Fitting Configurations
| Type | Configurations | Typical Application |
|---|---|---|
| Longsweep Elbow | F×M | Direction change with reduced flow turbulence |
| Elbow | F×M (45°/90°) | Standard 45° or 90° direction change |
| Tee | F×F×F, F×F×M, F×M×F, F×M×M, M×M×M, M×F×M | 90° branch off main line |
| Cross | F×F×F×M, F×M×F×M, F×M×M×M | Four-way intersection for complex manifolds |
| Wye (Y-fitting) | F×M | 45° flow split with reduced turbulence |
| 45° Lateral | F×M | 45° branch from main line |
| Crowfoot Cross | F×M | Three-way split for distribution manifolds |
| Pup Joint | F×M (custom length) | Length adjustment between manifold components |
How Integral Fittings Work
Integral fittings serve as the building blocks of high-pressure surface manifolds used in oilfield operations. Each fitting combines the body and end connections into a single forged piece, eliminating welds and threaded joints — both of which are common failure points under the cyclic pressure, vibration, and abrasive service conditions found in fracturing and well-testing operations.
The hammer union (wing nut) end connections provide a quick, reliable seal by compressing a metal-to-metal or elastomer seal ring between the matching faces. The wing nut (bull plug or nut) can be backed off and the fitting disconnected in seconds — no torches, no wrenches, no special tools. This dramatically reduces rig-up/rig-down time and allows operators to reconfigure manifolds as needed.
The removable retainer ring on the wing nut end allows field replacement of worn wing nuts without cutting or welding — extending the service life of the fitting itself. The chamfered bore at the connections reduces flow turbulence, which in turn minimizes erosion and extends service life in high-velocity, sand-laden service.
Applications
- Hydraulic fracturing (frac) manifold systems
- Cementing operations and wellhead construction
- Wellhead testing and clean-up lines
- Acidizing and stimulation services
- Plug valve choke and kill manifolds
- Surface flow manifolds at the wellhead
- Frac tree assembly (goat head / frac head)
- Mobile wellsite service and workover rigs
- Sour gas (H₂S) service with NACE-compliant materials
Why Choose DEENPU Integral Fittings
- API 16C Certified Manufacturing: ISO 9001-2015 and API 6A/16C certified facility, audited by DNV
- Forged From Bar Stock: No castings, no welds — true one-piece construction for maximum integrity
- Premium Alloy Steel: AISI 4130/4140 with verified heat treatment and hardness testing
- Field-Serviceable: Rem retainer rings allow wing nut replacement without cutting the fitting
- Compatible with Major Brands: Interchangeable with Weco, FMC, and Chiksan hammer union fittings
- Rapid Lead Times: Standard configurations typically ship in 2-4 weeks
- Custom Lengths: Pup joints available in any length to meet specific manifold layouts
Ordering Information
To order DEENPU Integral Fittings, please specify:
- Fitting type (Elbow, Tee, Cross, Wye, Lateral, Pup Joint, etc.)
- Nominal size (2″, 3″, or 4″)
- Figure (Fig 1502, Fig 1002, or Fig 602)
- End connection configuration (e.g., F×M, F×F×F, M×M×M)
- For elbows: angle (45° or 90°)
- For pup joints: total length (inches or feet)
- Service type: Standard or Sour Gas (NACE)
- Quantity and delivery timeline
Contact DEENPU for Orders & Technical Support
Email: SALES@DEENPU-MACHINERY.COM
Phone / WhatsApp: +86 18051728055
ATTN: LINDA HU
Address: Yandu District, Yancheng City, Jiangsu Province, China
Web: www.deenpu-machinery.com
Our company has been in the oil & gas drilling equipment industry for over more years, We are here to serve all your drilling equipment needs.
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