## What is the maximum allowable stress for copper?

The allowable stress for annealed copper is 6000 psi at 100 oF. The allowable stress for annealed copper is 5100 psi at 150 oF.

**What is correct about copper tubes?**

Copper pipes are commonly used in the construction industry for residential water supply lines and sometimes for drain and vent lines. Copper pipes can be manufactured as soft or rigid copper and they offer excellent corrosion resistance and reliable connections.

### What is the OD of 15mm copper pipe?

15mm outside diameter, 0.7mm wall thickness, 13.6mm nominal inside diameter.

**Is copper pipe measured by ID or OD?**

In the plumbing trade, the size of copper tubing is measured by its outside diameter in millimeters. Common sizes are 15 mm and 22 mm. Other sizes include 18 mm, 28 mm, 35 mm, 42 mm, 54 mm, 66.7 mm, 76.1 mm, and 108 mm outside diameters.

## What is basic allowable stress?

The allowable stress or allowable strength is the maximum stress (tensile, compressive or bending) that is allowed to be applied on a structural material. The allowable stresses are generally defined by building codes, and for steel, and aluminum is a fraction of their yield stress (strength):

**What is the OD of 1 inch copper pipe?**

1.125

Nominal Pipe Size inches | O.D. | I.D. |
---|---|---|

Type | ||

1 | 1.125 | 1.055 |

1-1/4 | 1.375 | 1.291 |

1-1/2 | 1.625 | 1.527 |

### How much pressure can a 1/2 inch copper pipe hold?

Using type L copper pipe at 100 degrees Fahrenheit as an example, 1/2-inch copper pipe has a maximum working pressure of 1,242 pounds per square inch, the maximum pressure of 3/4 inch is 1,002 pounds per square inch and 1-inch pipe is 850 pounds per square inch.

**How much pressure can a soldered copper pipe hold?**

A soldered four-inch Type L joint has a pressure rating of 440 psi. If the plumber in the field decides to braze that joint rather than solder it, the rating will be reduced to 293 psi — the annealed rating.

## What is allowable stress in piping?

1 – Power piping, allowable stress is tensile strength at temperature divided with 3.5.

**Do green copper pipes need to be replaced?**

Green heating pipes do not necessarily need to be replaced, but if you see oxidation on the pipes, you should investigate to find the source. It could result from a pinhole leak in the pipe, faulty join, or dampness in a wall. If the corrosion is significant, the pipe may need replacement.

### Should I worry about green copper pipes?

Patina, or the greenish colour that appears on copper pipes, happens from oxidation. Oxidation is common on copper when it is exposed to water and air over time. While this oxidized layer is not harmful, it does cause the copper to become corroded.