Shouldered Pipe
Shouldered Pipe
The shouldered pipe is suitable for mining, cement, and concrete industries. The shouldered pipe is designed for air, water, and slurry applications. It is occasionally used in place of the flanged joint and is suited for all specified applications, including those found in treatment plants and pump stations. Additionally, the shouldered pipe is strong and lightweight, making it easy to handle and use. It is quite simple to install and considered flexible because it allows for some angular and axial movement within the jointing mechanism. The shouldered pipe is available in sizes ranging from 50NB to 300NB, and it comes with a hot-dip galvanized coating.
Shoulder Steel rings are welded to the outside of the pipe ends in an interference fit configuration. Steel shoulder rings are fitted with Pipe ends that conform to the tolerances specified in the Shoulder Dimensions. Shoulder rings are meticulously fitted to avoid ring deformation. Additionally, hydrostatic testing of these shouldered pipes can be scheduled and done.
 PRODUCT FEATURES
Types of Shouldered Piping System
- Alvenius Type
- Victaulic Type
- Klambon Type
Executive Standard of Shouldered Pipe
- EN 10255 – Non-Alloy steel tubes suitable for welding and threading – Technical delivery conditions
- BS 1387 – ERW steel tube specification with Light, Medium & Heavy series
- AS/NZS 1074 – Steel tubes and tubulars for ordinary service
Galvanizing Standard of Shouldered Pipe
- EN 1024 – Clay roofing tiles for discontinuous laying – Determination of geometric characteristics
- AS/NZS 4680 – Hot-dip galvanized (zinc) coatings on fabricated ferrous articles
- ISO 1461 – Hot dip galvanized coatings on fabricated iron and steel articles — Specifications and test methods
- SANS 121 – SOUTH AFRICAN NATIONAL STANDARD – Hot dip galvanized coatings on fabricated iron and steel articles
Dimensions and Sizes of Shouldered Pipe
SHOULDERED PIPE DIMENSIONS | |||||
O. D. | NPS | “DS” | Tolerance +/- | “L” | |
mm | mm | mm | mm | mm | mm |
60.3 | 50 | 66.5 | 0.8 | 0.8 | 16 |
88.9 | 80 | 97 | 0.8 | 0.8 | 16 |
114.3 | 100 | 122 | 0.8 | 0.8 | 17.5 |
165.1 | 150 | 174.5 | 0.8 | 0.8 | 17.5 |
168.3 | 150 | 178 | 0.8 | 0.8 | 17.5 |
219.1 | 200 | 232 | 0.8 | 1.4 | 20.5 |
Dimensions and Sizes of Rings on Shouldered Pipe
O. D. | NPS | Ring I. D. | Ring O. D. | Tolerance +/- | Ring Width | |
mm | DN | mm | mm | mm | mm | Width |
60.3 | 50 | 60.3 | 66.5 | 0.8 | 0.8 | 16 |
88.9 | 80 | 88.9 | 97 | 0.8 | 0.8 | 16 |
114.3 | 100 | 114.3 | 122 | 0.8 | 0.8 | 17.5 |
139.7 | 125 | 139.7 | 149 | 0.8 | 0.8 | 17.5 |
165.1 | 150 | 165.1 | 174.5 | 0.8 | 0.8 | 17.5 |
168.3 | 150 | 168.3 | 178 | 0.8 | 0.8 | 17.5 |
219.1 | 200 | 219.1 | 232 | 0.8 | 1.4 | 20.5 |
273 | 250 | 273 | 286 | 0.8 | 1.9 | 20.5 |
323.9 | 300 | 323.9 | 336.5 | 0.8 | 2.4 | 20.5 |
355.6 | 350 | 355.6 | 368.5 | 0.8 | 2.4 | 24 |
406.4 | 400 | 406.4 | 419 | 0.8 | 2.4 | 25.5 |
457 | 450 | 457 | 470 | 0.8 | 2.4 | 25.5 |
Working & Test Pressures Shouldered Pipe
O. D. | W. T. | Max Working Pressure | Max Test Pressure |
mm | mm | mpa | mpa |
60.3 | 2 | 8.8 | 19 |
88.9 | 2 | 5.6 | 12 |
114.3 | 2 | 5.6 | 10 |
165.1 | 2.5 | 4.2 | 8.8 |
219.1 | 3.2 | 3.8 | 8 |
- The test and working pressures specified above apply exclusively to internal pressures in the straight pipe at a maximum working medium temperature of 50 degrees Celsius.
- The maximum operating pressure of a pipe system is restricted by the connecting system’s capabilities. This operating pressure is restricted in the Shouldered Pipe Product to that of the Shouldered Couplings. As a result, systems should be built with the coupling’s maximum operating pressure in mind.
Material Strengths of Shouldered Pipe
- Minimum Longitude Yield Strength 350 MPa
- Minimum Transverse Yield Strength 289 MPa
- Minimum Tensile Strength 430 MPa
Facts about Shouldered Pipe
- Weld-On steel shoulder rings, the interference fit with the exterior of the pipe ends is critical, and hence the fit must be clean.
- Pipe ends to which steel shoulder rings are to be mounted should be within the tolerances specified under Shoulder Dimensions.
- To acquire these statistics, circumferential tape (or another appropriate averaging technique) should be used to measure the pipe ends.
- Pipes that do not meet this tolerance must be sized for a 50mm radius from the end.
- When installing shoulder rings, caution is essential to avoid ring deformation.
- It is critical to maintain a precise gap between the edge of the steel shoulder ring and the pipe end. If this “Stand off” value (see the table below) is surpassed, distortion occurs. For holding and fastening, a setting jig is advised.
- Before welding, the pipe ends and steel shoulder rings must be clean and free of corrosion, grease, and paint.
- Remove all spatter from the face and border of the steel shoulder ring following welding.
- If pipe ends are discovered to be oval after welding, they must be rounded to the specified dimensions and tolerances to suit the housings.
