Engineering Bulletins

Failure Analysis: Identifying the Corrosion Culprit

Are PFAS Bans an Opportunity for Metal Hose?

Why Tolerances Can’t Be Zero

Fitting Attachment Welds for Metal Hose Assemblies

Preparing Hose Assemblies with NPT Ends for Leak Testing

When to Request Radiographic Testing for Your Metal Hoses?

What Does ASME B31.3 and B31.1 Compliance Mean for Metal Hoses?

What’s the Difference Between Static and Dynamic Bend Radius?

How to Handle Interlocked Hoses

Is a Pressure Tight Interlocked Hose Really Possible?

Using Traveling Loops to Accommodate Axial Movement in Piping System

Accommodating Out of Plane Movement in a Piping System

Alloy Selection in Ammonia Service

How Much Weight Can a Hose Hung Vertically Support?

Alloy Selection for Sulfur and Sulfuric Acid Applications

How Long Will a Metal Hose Last in Service?

How to Install an Expansion Joint

Differences Between the 300 Series Stainless Steels

How to Avoid the Most Common Mistake When Welding a Cap Pass

Delay Work Hardening of Metal Bellows in High Vibration Applications

Failure Analysis: Braided Hose in High Vibration Applications

Comparing Metal and Rubber Lance Hoses

What’s the difference between Penflex P3 and P4 Series Hoses?

An Overview of Common Expansion Joint Accessories

When to Use an Expansion Joint Instead of a Hose

How Liquid Penetrant Inspection (PT) Works

What Makes Metal Hose Corrosion Resistant?

An Introduction to Microbially Influenced Corrosion (MIC)

No Simple Solutions When It Comes to Oxygen Service Cleaning

Weld Purging with Argon Gas: An Industry Standard

When to Fret about Fretting Corrosion

Sour Gas Transfer: Considerations Around Metal Hose Alloy Selection

The Case for Positive Material Identification

Test Results: Metal Hose Cycle Life

Hardworking Hoses for Well-Executed Turnarounds

Hose Assembly Handling for Terminal Operators

Why Flexibility Doesn’t Necessarily Mean Longer Service Life

Hose Flexibility: A Complex Calculation

Causes and Prevention of Hydrogen Embrittlement

H Grade May Be Specified, but You Might Not Need It

Considerations on Managing High Flow Velocity with Interlocked Liners

How to Avoid Stress Corrosion Cracking

Common Causes of Hose Assembly Failure

Leak Testing for Cryogenic Hoses

Loose Braid Consideration: Vacuum Pump Tightening Method

Making Hose from Tube: Penflex Uses Several Mechanical Forming Methods to Form Hose

Considerations for Duplex or Steam Jacketed Hoses

California Proposition 65 Statement

Using Corrugated Hose for Vacuum Applications

P4 Products Are in Accordance with ISO 10380 Standard for Sizes 1/4″ to 2″

How We Calculate Maximum Allowable Working Pressure (MAWP)

Non-Destructive Testing Program and NDT Lab

Common Alloys: Cross-Reference of American with German & European Standards

Loose Braid Consideration: Methods of Tightening Braid on Hose

Hose Assembly Cut Length Calculation

BS EN 10204:2004 Metallic Products: Types of Inspection Documents

How Many BTUs Can be Handled by Corrugated Hose?

Corrosion of Common Alloys in Dry Chlorine (Cl2)

P3 Products Are in Accordance with ISO 10380 Standard

Braid: Consideration for Use on a Different Hose OD

Basic Steps in Hose Assembly Failure Analysis

Environmental Corrosion of Stainless Steel

Vibration and Minimum Hose Length Requirements

Austenitic Steels: Mechanical Properties at Cryogenic Temperatures

Operating Conditions and Reduction Factors Consideration

Calculation of Pressure Loss in Corrugated Hoses

Corrugated Metal Hose in Externally Pressurized System Under Vacuum

Calculating Pitting Resistance Equivalent Number (PREN)

Corrugated Metal Hose and Flow Velocity Consideration

Assembly Installation Handling Precautions

Service Temperatures of Austenitic Steels & Other Materials

Chloride/Chlorine Levels and Stainless Steel Alloy Selection

The Advantages of Using Monel Hose vs. Teflon for Chlorine Transfer

The Advantages of Using 321 SS vs. 304/304L SS

Leak Detection Methods

Changes and Additions to Penflex Product Catalog