Dresser Style 38 Coupling with Viton Gasket
Dresser Style 38 Coupling with Viton Gasket

Dresser Style 38 Coupling | Cast/Ductile Iron

Outside Diameter: 2.5 in
Middle Ring: (Thickness x Length) (inch): 0.188 in X 5 in
Gasket Type: (27) Buna S
$184.29
SKU: 0038-0015-011
Weight: 12.0 lb
Available For Order! Call Sales Counter for accurate lead-time!
Description
Dresser Industrial Couplings

Style 38 Coupling
Cast / Ductile Iron

A field-proven bolted sleeve coupling delivering flexible, leakproof connections on steel pipe — no threading, beveling, or precise alignment required.

½? – 400?+ OD
Fusion-Bonded Epoxy Coated
AWWA C111 / ANSI A21.11 Bolts
Up to 1,500 PSI
Stainless Upgrade Available
Overview

The Dresser Style 38 is a time-tested bolted sleeve coupling engineered for flexible, leakproof connections on steel pipe across a virtually unlimited size range — from ½? ID up to over 400? OD. With decades of proven field service, it's the go-to choice wherever rigid fittings are impractical or where pipe movement, vibration, or minor misalignment is a factor.

Resilient gaskets absorb vibration and accommodate pipe movement in all directions. Curved pipeline routes can be laid with straight pipe lengths, eliminating the need for costly custom bends. Installation requires only a wrench — no welding, threading, or beveling — making it accessible to standard crews regardless of weather conditions.

Followers are available in cast or ductile iron for standard applications, with malleable iron used on sizes ½? through 1½?. For severe corrosive environments, an all-stainless steel variant (Type 304 or Type 316) is available with matching gasket compounds.

Key Features
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Tool-Only Installation
No threading, beveling, or exact pipe alignment required. A wrench is all it takes — safe, fast, and weather-independent.
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Flexible Joint
Accommodates angular deflection, end movement, and minor misalignment. Curved routes built from straight pipe runs.
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Unlimited Size Range
Standard catalog sizes from ½? ID to 48?+ OD. Custom fabrication available for any pipe OD or special condition — consult factory.
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Fusion-Bonded Epoxy Coating
Factory-applied FBE on followers and middle ring provides corrosion protection for buried and wet service environments.
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Vibration Absorption
Resilient Dresser gaskets isolate and absorb vibration and thermal pipe movement, protecting adjoining system components.
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Multiple Gasket Compounds
Available in Buna-S, Buna-N, EPDM, Butyl, and Viton® for compatibility across a wide range of fluids and service temperatures.
Materials of Construction
Followers (2? and Larger)
AISI C1012 or ASME SA36
Cast or Ductile Iron
Followers (½? – 1½?)
Ductile Iron or Malleable Iron
Small-diameter standard
Middle Ring
ASTM A513 / A635 / SA675 Gr.60
Steel sleeve body
Bolts & Nuts
AWWA C111 / ANSI A21.11
E-coated steel as standard
Exterior Coating
Fusion-Bonded Epoxy (FBE)
Factory-applied
Stainless Option
Type 304 or Type 316
Full body or components only
Working Pressure — Representative Sizes
? Light Pattern Note
Couplings marked as Light Pattern carry a standard pressure rating of 150 PSI. Standard-pattern working pressures are calculated via Barlow's formula at one-half minimum yield of the middle ring material. Always confirm selection against your specific pipe OD and service conditions.
Nominal Size Pipe OD (in) Working Pressure (PSI) Max. Test Pressure (PSI) Approx. Weight (lbs) Relative Pressure
½? 0.840 1,500 2,250 2
2? 2.375 1,500 2,250 7
3? 3.500 982 1,473 13.5
4? 4.500 931 1,396 16.5
6? 6.625 1,029 1,544 25.5
8? 8.625 807 1,211 32
10? 10.750 657 986 40
12? 12.750 558 837 56
16? 16.000 449 673 70
24? 24.000 304 456 105
36? 36.000 253 379 181
48? 48.750 304 456 399
Note: Commonly used sizes shown. Couplings available for all steel pipe sizes. Higher-pressure ratings achievable with 3/8? middle ring wall on larger diameters — consult factory. Light Pattern sizes carry 150 PSI standard rating.
Gasket Compound Options
Buna-S
Grade 27
General water service, standard buried applications
Buna-N (Nitrile)
Grade 42
Oil, gas, and petroleum-based fluids
EPDM
Ethylene Propylene
Potable water, ozone resistance, outdoor exposure
Butyl
—
Chemical service, steam condensate, low-temp applications
Fluorocarbon
Viton®
Aggressive chemicals, solvents, high-heat service
High Temperature
Up to 1,200°F
Steam lines, high-temp industrial process piping
Bolt Dimensions by Pipe Size
Nominal Size (in) Pipe OD (in) Middle Ring Thickness × Length No. of Bolts × Bolt Diam. × Length Overall Length "L" (in)
½? 0.840 .156 × 3½ 2 – ½ × 6 8
¾? 1.050 .156 × 5 2 – ½ × 7¼ 8½
1? 1.315 .148 × 5 2 – ½ × 7¼ 8½
1¼? 1.660 .154 × 5 2 – ½ × 7¼ 8½
1½? 1.900 .165 × 5 2 – ½ × 7¼ 8½
2? 2.375 .156 × 5 2 – ? × 8¼ 9½
2½? 2.875 .180 × 5 3 – ? × 8¼ 9½
3? 3.500 .156 × 5 4 – ? × 6 8
4? 4.500 .188 × 5 4 – ? × 6 8
5? 5.563 ¼ × 5 4 – ? × 6 8
6? 6.625 ¼ × 5 6 – ? × 6 8
8? 8.625 ¼ × 5 6 – ? × 6 8
10? 10.750 ¼ × 7 8 – ? × 8¼ 9½
12? 12.750 ¼ × 7 8 – ? × 8¼ 9½
16? 16.000 ¼ × 7 10 – ? × 10¾ 11?
24? 24.000 ¼ × 7 14 – ? × 10¾ 11?
36? 36.000 ? × 7 18 – ? × 10¾ 11?
48? 48.750 ½ × 10 22 – ? × 15 16½
Dimension "L" measured with fasteners drawn finger-tight. Thicker or longer middle rings available on request. Specify if pipe stop is required.
Installation Notes
Installation — General Guidance
Tighten bolts uniformly and alternately across opposing bolt positions to maintain even gasket compression. Refer to the Dresser Style 38 Torque Guide for specified torque values by pipe size and bolt diameter. Adequate thrust restraint or blocking must be provided where pipe movement could cause disengagement — this coupling does not provide axial restraint unless a restraining version is specified.
Ready to Order?
Contact us to confirm pipe OD, bolt pattern, and gasket compound for your application.
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