Dresser Gas Main Coupling, Style 38 Gas Series Coupling
Dresser Gas Main Coupling, Style 38 Gas Series Coupling

Dresser Gas Main Coupling - Style 38 Gas Series

Nominal Size - OD: 1/2 in - 0.84 in OD
Middle Ring: 0.156 x 3-1/2 in
Build - Part No.: AP27, A/C - 0038-0002-202

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$125.46
SKU: 0038-0002-202
Weight : 2.0 lb
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Description
Dresser · Gas Main Coupling
Style 38 Gas Series Coupling
Bolted coupling for plain-end steel gas mains, 1/2 in to 24 in, gas price-list builds.
150-900 PSI by Size
Armored Grade 27 Gaskets
Carbon Steel Middle Ring
E-Coated AWWA C111 Bolts
Natural Gas Service
0.84-24.00 in Pipe OD
2-120 lb Weight
Overview

Dresser Style 38 couplings give a flexible, leakproof joint on plain-end steel pipe that lasts the life of the pipe. No threading, beveling, exact fitting or alignment is needed: the resilient gaskets absorb vibration and pipe movement and let curves be laid with straight lengths. These are the builds listed in Dresser’s Gas price list, with armored or armored pinned Grade 27 gaskets.

Application: Joining and repairing plain-end steel natural gas mains.

  • Seal-only bolted sleeve: middle ring, two followers, two gaskets
  • Absorbs vibration, expansion, contraction and deflection
  • Gas price-list builds with armored or armored pinned gaskets
What Ships and What It Needs to Run

Included: middle ring, two followers, two gaskets of the build selected, bolts and nuts.

Anchoring, by others: the coupling seals but does not restrain the pipe.

Genuine Dresser equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
12-Month Dresser Warranty

Covered for 12 months from the date of purchase under Dresser’s published warranty terms.

Working Pressure

Rated by size and middle ring in Dresser’s gas catalog, from 150 PSI to 900 PSI. Ratings follow Barlow’s formula at half the minimum yield of the middle ring; the allowable pressure on a job also depends on the pipe and the service.

Working pressure by size (34 rows)
Nominal Pipe OD Middle ring Working pressure
1/2 in 0.840 in 0.156 x 3-1/2 in 150 PSI
3/4 in 1.050 in 0.156 x 5 in 150 PSI
1 in 1.315 in 0.148 x 5 in 150 PSI
1-1/4 in 1.660 in 0.154 x 5 in 150 PSI
1-1/2 in 1.900 in 0.165 x 5 in 150 PSI
2 in 2.375 in 0.154 x 5 in 150 PSI
2 in 2.375 in 0.154 x 7 in 150 PSI
2-1/2 in 2.875 in 0.180 x 5 in 350 PSI
3 in 3.500 in Standard 350 PSI
3-1/2 in 4.000 in Standard 400 PSI
4 in 4.500 in 0.188 x 7 in 400 PSI
5 in 5.563 in 0.250 x 5 in 900 PSI
5 in 5.563 in 0.250 x 7 in 900 PSI
6 in 6.000 in 0.250 x 5 in 900 PSI
6 in 6.625 in 0.250 x 5 in 900 PSI
6 in 6.625 in 0.250 x 7 in 900 PSI
8 in 8.000 in 0.250 x 5 in 750 PSI
8 in 8.625 in Standard 750 PSI
10 in 10.750 in 0.250 x 5 in 600 PSI
10 in 10.750 in 0.250 x 7 in 600 PSI
12 in 12.750 in 0.250 x 5 in 550 PSI
12 in 12.750 in 0.250 x 7 in 500 PSI
12 in 12.750 in Standard 500 PSI
14 in 14.000 in 0.250 x 7 in 500 PSI
14 in 14.000 in 0.375 x 7 in 500 PSI
16 in 16.000 in 0.250 x 7 in 450 PSI
16 in 16.000 in 0.375 x 7 in 450 PSI
18 in 18.000 in 0.375 x 7 in 400 PSI
20 in 20.000 in 0.250 x 7 in 300 PSI
20 in 20.000 in 0.375 x 7 in 300 PSI
22 in 22.000 in 0.250 x 7 in 300 PSI
22 in 22.000 in 0.375 x 7 in 300 PSI
24 in 24.000 in 0.250 x 7 in 300 PSI
24 in 24.000 in 0.375 x 7 in 300 PSI

Source: Dresser Seal-Only Steel Products Catalog for Gas (NGS-DPS-016). The rating on the product label is the actual rating of each part.

Materials Specifications
Middle ring ASTM A513, ASTM A635 or ASME SA675 Gr 60
Followers AISI C1012 or ASME SA36
Bolts AWWA C111/ANSI A21.11, E-coated
Gaskets Grade 27 Buna-S, armored or armored pinned
Coating Fusion-bonded epoxy; ALCLAD on builds coded ALCLAD

Source: Dresser Seal-Only Steel Products Catalog for Gas (NGS-DPS-016).

Build Codes

Build codes are printed as in Dresser’s Gas price list. AP27 and APIN are armored pinned Grade 27 gaskets, ARM27 is an armored Grade 27 gasket, P42 is a Grade 42 gasket and ALCLAD is Dresser’s fusion-bonded epoxy coating. For any other code (A/C, RR), ask us and we confirm the build with Dresser.

Installation Notes
  • Mark the pipe and stab it into the coupling to the full stab depth.
  • Anchor the pipe joint wherever pull-out can occur; the coupling seals but does not restrain.
  • Clean dirt, rust, oil and loose scale from the pipe ends and check the gasket seat for gouges.
  • Lubricate the gaskets, pipe OD and middle ring flares with soapy water or a non-petroleum lubricant.
  • Tighten the nuts on opposite sides evenly to the recommended torque, and check every nut before backfilling.
  • Read the Dresser installation instructions and warnings before installing.

Source: Dresser installation instructions for Styles 38, 40 and 128 (tag 0001-0737-999) and the Gas Product Selection Guide (NGS-DPS-015) warnings.

Before You Order. Measure the pipe OD and match the middle ring to your joint. Non-stock Dresser parts are not returnable without Dresser’s authorization, and ship time is confirmed when you order. For other sizes, builds or a factory submittal, email sales@watermainsupply.com with the pipe OD, material and line content.
For engineering-led sizing and selection support or a factory submittal, email sales@watermainsupply.com or call 1-888.510.4036.
© Watermain Supply — A division of E4 Industrial LLC
Data Sheet
Seal-Only Steel Products Catalog for Gas (NGS-DPS-016) Gas Product Selection Guide (NGS-DPS-015)
Videos

Product videos are being added to this listing. For a walkthrough in the meantime, email sales@watermainsupply.com.

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