Schedule 80 galvanized pipe

What is Schedule 80 galvanized pipe?

    Schedule 80 galvanized pipe is a type of steel pipe coated with a layer of zinc to prevent corrosion. The designation 'schedule 80' indicates that the pipe has a thicker wall and can withstand higher pressure than schedule 40 pipes. It is commonly used in industrial and commercial settings where resistance to corrosion and high-pressure environments are important.

Stretch requirements for Schedule 80 galvanized pipe:

    The required tensile strength for Schedule 80 galvanized pipe is often determined by regulatory agencies or industry standards organizations. These requirements may vary depending on factors such as the pipe's material composition, manufacturing process, and intended application. Ensure you refer to relevant standards, such as ASTM (American Society for Testing and Materials), or other applicable specifications to determine the exact tensile strength requirements for schedule 80 galvanized pipe in your specific situation.

Here are examples of potential tensile strength requirements for schedule 80 galvanized pipe based on different standards:

ASTM A53: Minimum tensile strength of 48,000 psi
ASTM A106: Minimum tensile strength of 60,000 psi

API 5L: Minimum tensile strength varying based on the specific grade of steel used

Schedule 80 galvanized pipe sizes:

The sizes of schedule 80 galvanized pipe can vary depending on the nominal size and specific standards being followed. However, as a general reference, here are some common dimensions for schedule 80 galvanized steel pipe:
Nominal Size: 1/8" to 16".
Outer Diameter (OD): Varies based on nominal size.
Wall Thickness: Typically thicker than schedule 40 pipes, specific measurements depend on nominal size and standards.
Length: Standard lengths often range from 21 feet to 24 feet.

Schedule 80 galvanized pipe pressure rating:

The pressure rating for schedule 80 galvanized pipe depends on various factors including the nominal size, temperature, and specific standards or codes being followed. As a general guideline, here are typical pressure ratings for schedule 80 galvanized pipe at room temperature (70°F / 21°C):
1/8" to 1": 690 psi
1 1/4" to 2": 630 psi
2 1/2" to 3": 550 psi
3 1/2" to 4": 510 psi
5" to 6": 490 psi
8" to 10": 420 psi
12" to 14": 360 psi

16": 280 psi

How to galvanize Schedule 80 pipe?

Galvanizing schedule 80 pipe involves a process known as hot-dip galvanizing, which is commonly used to protect steel from corrosion. Here are the general steps involved in galvanizing schedule 80 pipe:

(1) Surface Preparation
The pipe is cleaned to remove any rust, oil, or mill scale that may be present on the surface. This is typically done using a combination of caustic cleaning, pickling, and rinsing.

(2) Fluxing
The cleaned pipe is then immersed in a flux solution to promote the adhesion of the zinc coating. The flux also helps to remove any remaining oxides on the surface of the steel.

(3) Galvanizing
The prepared pipe is dipped into a bath of molten zinc at temperatures around 840°F (449°C). The immersion time is carefully controlled to ensure proper coating thickness.

(4) Inspection and Quenching
After galvanizing, the pipe is inspected for uniform coverage and then quenched in water to cool it down.

(5) Post-Treatment
If necessary, the galvanized pipe may undergo further processes such as passivation or chromate conversion coating to enhance the performance of the zinc coating.

It's important to note that hot-dip galvanizing should be performed in accordance with industry standards and best practices to ensure the quality and integrity of the coating. Additionally, safety measures should be followed when working with hot molten zinc.