Hengtong Updates

Cleaning Knowledge for Forged Flanges

08 Jan,2024

Cleaning Knowledge for Forged Flanges

Various chemical agents, which may be acidic or alkaline, are used in the cleaning of forged‑flange pipelines to dissolve a range of contaminants adhering to the inner walls.


How to assess the quality of steel pipes

03 Jan,2024

How to assess the quality of steel pipes

Here’s what you need to know about methods for identifying the quality of steel pipe products.


Inspection of Welded Elbows

29 Dec,2023

Inspection of Welded Elbows

Visual inspection, conducted primarily by the naked eye and with a magnifying glass, can reveal surface defects in welded elbow welds, such as undercut, weld buildup, surface cracks, porosity, slag inclusions, and burn-through.


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How to assess the quality of a necked flat‑weld flange

How do you assess the quality of a necked flat‑weld flange? This is a concern for many customers. Here are five methods to help you make an accurate selection.

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