3 Things to Look for in a Flexible Metal Hose Manufacturer

A flexible metal hose, also known as a corrugated metal hose, is available in various grades of industrial steel. It is a general-purpose industrial hose suitable for a wide range of industrial applications. It features a long service life, good corrosion properties, and high physical strength. The flexible metal hose is suitable for the transport of all kinds of liquids and gasses which are in a temperature range from -160°C to +700°C.

Customers looking for a manufacturing supplier need to consider several things before selecting a vendor:

Welding and Inspection Certifications

Many organizations require certification. As a customer, it is important to make sure that the manufacturer has the required certification. One of the most common certifications is ASME Section IX. This informs the customer that the welding process has resulted in an effective weld and that the welder is qualified to make that weld. Keep in mind that this is a requirement set by the customer. There are non-destructive tests such as x-rays and ultrasound that can be used to detect irregularities in the internal weld. The minimum requirement is a visual inspection.

Testing Methods

Customers require that certain tests be performed on the flexible metal hose. NAHAD standards require an air-under-water test. The hose is held underwater for up to one minute. This test is used to determine if there are any leaks that could be due to improper welding.

According to numerous sources, the maximum working pressure, after correction of application temperature, should not exceed 25% of the nominal rated burst pressure. The safety factor is generally given as 4:1. This means that, while testing your metal hose, you should be sure never to exceed this pressure.

The Difference Between Hydroforming and Mechanical Forming

The tube is first made as a flat strip. Then it is rolled and welded into a tube. The omega shape is created by running the tubing through a corrugator. In hydroforming, water is used to press the tubing radially outward. Mechanical forming, on the other hand, uses metal tools that stretch the metal to create the omega shape.

These factors play an important role in the quality of the product produced by the manufacturer and the degree of satisfaction or dissatisfaction that the customer may experience when purchasing the product. Speak to one of the qualified technicians at Universal Metal Hose today to find out if a flexible metal hose meets all industry standards. Having been in the industry for nearly 80 years, we will be able to tell you if a product is right for you.