Knowledge

28Oct, 2024

Heating Method for Pickling Solution - Direct Heating with Hot Exhaust Gas
Advantages: Low heating cost and high heat utilization efficiency. Disadvantages: Easy contamination of the pickling solution and higher equipment costs.
28Oct, 2024

Heating Method for Pickling Solution - Immersion Flame Heating Method
Advantages: Quick heating, effective stirring of the pickling solution, and no dilution of the pickling solution. Disadvantages: Relatively complex equipment structure, high manufa
28Oct, 2024

Heating Method for Pickling Solution - Electric Heating Element Method
Advantages: The equipment structure is compact and convenient to use. Disadvantages: High cost, potential hazards if the heating element is damaged, and occupation of a certain wor
28Oct, 2024

Heating Method for Pickling Solution - Steam Heating Pipe Heating Method
Advantages: It avoids the dilution of the pickling solution by steam condensate water and saves acid consumption. Disadvantages: The heat utilization efficiency of steam is low, th
27Oct, 2024

Heating Method for Pickling Solution - Steam Nozzle Heating Method
Advantages: Lower noise levels and reduced vibrations: The method generates less noise and vibrations compared to other heating methods. Ideal mixing effect: It provides a good sti
27Oct, 2024

Heating Method for Pickling Solution - Direct Steam Heating Method
Advantages: Simple and convenient: It only requires placing the steam pipe (or covered with a rubber hose) directly into the pickling solution. The heat utilization rate of steam i
27Oct, 2024

What are the heating methods for pickling solutions, and what are their advan...
Generally, the heating methods for pickling solutions include direct heating with steam pipes, heating with steam nozzles, heating with steam heating pipes, heating with electric h
27Oct, 2024

Why are there obvious clusters of corrosion pits on the surface of welded ste...
After pickling, welded steel pipes, especially those welded by gas or furnace methods, are prone to developing corrosion pits along the longitudinal weld seams. The reason for the
27Oct, 2024

What is acid embrittlement (or hydrogen embrittlement), and how does it occur?
The so-called acid embrittlement of steel pipes refers to the phenomenon where the mechanical strength of steel pipes decreases and the steel becomes brittle after pickling. The de
26Oct, 2024

What quality defects are prone to occur during the pickling process and how c...
(1) Under-pickling: After pickling, there may be locally unremoved iron oxide scale remaining on the surface of the steel pipe, which is referred to as under-pickling. Avoidance: F
26Oct, 2024

Why are steel pipes sometimes soaked in hot water before pickling in some ope...
Before the pickling process, it is advisable to preheat the steel pipe blanks in hot water at a temperature of 25-50°C for 1-3 minutes before proceeding with pickling. This ser
26Oct, 2024

The internal and external factors affecting the pickling of steel pipes can b...
The composition, structure, processing procedure, surface condition, etc., of the steel pipe itself, as well as the composition, structure, thickness, and uniformity of the iron ox

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