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Dresser Pipeline Repair Joints
Dresser Style 131 Dismantling Joint - 3 in to 24 in
Dresser
Dresser Style 131 Dismantling Joint - 3 in to 24 in
- Price
- From $1,300.77
Dresser Pipeline Repair Joints
Description
Dresser Pipeline Joints
Dismantling and expansion joints solve the two most persistent problems in rigid piping systems: the need to remove in-line equipment without cutting pipe, and the need to absorb thermal movement without mechanical stress. Dresser Style 131 and Style 63 address both.
131
Dismantling Joint Style
63
Expansion Joint Style
Zero
Pipe Cutting Required
Product Lines
Two Joints, Two Problems Solved
These are precision-engineered components, not commodity fittings. Understand the functional distinction before specifying.
131Dismantling
Style 131 — Dismantling Joint
Allows linear adjustment of 2"–4" during installation and removal of valves, meters, pumps, and other flanged equipment. No pipe cutting or welding required to swap in-line components.
63Expansion
Style 63 — Expansion Joint
Absorbs axial thermal expansion and contraction in above-grade and buried metallic piping. Eliminates stress-induced fatigue at flanges and fittings caused by temperature cycling.
Style 131
Dismantling Joint — How It Works
The Style 131 consists of a flanged body, an inner sleeve, and a follower flange. The sleeve telescopes within the body to create the working gap needed for valve extraction.
Component Anatomy
1
Fixed Flange Body
Drilled to ANSI/AWWA flange standard. Bolts to the valve, pump, or meter being serviced.
2
Inner Telescoping Sleeve
Slides axially within the body. Creates the adjustment gap that allows equipment removal without disturbing adjacent pipe.
3
Follower Flange
Compresses the gland packing as bolts are tightened. Seals the annular space between sleeve and body.
4
Gland Packing / Gasket
Elastomeric seal that maintains leak-tightness across the full range of sleeve travel.
Key Advantage
A Style 131 dismantling joint installed at commissioning eliminates the need to cut and re-weld or re-flange pipe every time an in-line valve, meter, or pump requires replacement. That single installation decision can save 4–8 hours of labor and confined-space work per future service event.
Restraint Required
Dismantling joints are not self-restrained against internal pressure thrust. Install thrust blocks or tie-rod restraint assemblies whenever the joint is placed adjacent to a bend, tee, or dead end.
ANSI Flanges AWWA Flanges Max WP: 150–250 PSI (size dependent) Fusion Epoxy Coating
Style 63
Expansion Joint — Thermal Movement Math
Thermal expansion is not optional — it happens. The question is whether your pipeline absorbs it through a designed joint or through stress at the nearest rigid connection.
| Pipe Material | Expansion (in/100ft/10°F) | Design Use |
|---|---|---|
| Carbon Steel | 0.08" | Above-grade headers, steam lines |
| Ductile Iron | 0.07" | Buried transmission with temp variation |
| Copper | 0.11" | Building service lines |
| PVC | 0.30" | Non-metallic — use different product class |
Calculation Example
A 200-ft steel header operating between 40°F (winter) and 160°F (summer process heat) experiences 120°F ΔT × 0.08"/100ft/10°F = approximately 1.9" of movement. A Style 63 with 2" travel absorbs this without stress.
🌡️
Above-Grade Headers
Process plants, pump stations, and treatment facilities with uninsulated pipe exposed to ambient temperature swings.
⚡
Steam Distribution
Low- and medium-pressure steam lines where startup thermal shock generates large axial forces.
🏗️
Bridge Crossings
Exposed pipe on bridges experiences the full solar and ambient temperature range — one of the highest movement scenarios.
🔩
Building Tie-Ins
Entry points where buried pipe transitions to above-grade service within heated or cooled structures.
Field Applications
Where Each Joint Gets Specified
These two joint types often appear together on the same project — dismantling joints at equipment flanges, expansion joints at fixed-anchor spans.
🚰
Style 131
Pump Station Valves
Install at suction and discharge isolation valves on pump sets to allow future pump swap without dewatering the entire header.
💧
Style 131
Meter Vaults
Turbine and compound meters require periodic recalibration or replacement. A dismantling joint on each meter flange eliminates line-of-sight cutting.
🔥
Style 63
Steam Headers
Place at calculated expansion loop anchors wherever pipe cannot route through natural expansion bends.
🌉
Style 63
Aerial Crossings
Bridge-mounted pipe sees the most extreme thermal cycling of any installation type. Style 63 is almost always specified.
Decision Guide
Which Joint Do You Need?
Answer these two questions and you'll have your answer in under a minute.
1
Is your goal equipment access?
If the driver is removing or replacing flanged equipment (valves, meters, pumps) without cutting pipe — specify Style 131 Dismantling Joint. Size to match your flange class and nominal pipe size.
2
Is your goal absorbing movement?
If the driver is thermal expansion, settlement, or vibration in a rigid pipe run — specify Style 63 Expansion Joint. Calculate travel required and confirm the joint's rated stroke exceeds your design movement.
3
Need both?
Complex pump stations and process headers often require both types in the same system. Contact us with your P&ID or plan sketch and we'll specify both joint types and locations.
Ready to Order or Need Technical Help?
Contact our team for availability, custom sizing, and volume pricing on Dresser Utility Solutions products.
Email sales@watermainsupply.com Call 281.664.8000
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