1. The arc starting of the stainless steel pipe fittings adopts the reflow method, and the arc ending adopts the method of full arc crater. In the over-scale of arc starting, it should be completed within the slope, and arcing and arcing should not be performed on the surface of the pipeline and the

1. In the test results of straight seam steel pipes, when a certain item does not meet the requirements of the product standard, the unqualified ones should be picked out, and from the same batch of straight seam steel pipes, double the number of samples should be taken, and the unqualified items sh

1. Thermomechanical treatmentHigh-temperature thermomechanical treatment can improve the yield ratio and elastic limit of the spiral steel pipe. Improve the comprehensive mechanical properties, fatigue properties, and stress relaxation properties of spiral steel pipes. Reducing the ductile-brittle t

1. How does the gnawing of straight seam steel pipe happen? What is the effect on welded pipes?The gnawing edge of the straight seam steel pipe usually occurs on the slitting coil. The gnawing edge of the straight seam steel pipe is the appearance of jagged and uneven edges of the steel belt. The st

Project Location: Canada.Product: oil casing.Specifications:84*3*6000mm.Application: oil project construction.Arrival time: 07.12.2022.The steel pipes have arrived in Canada and were put into project use. Many cooperations have given the customer full confidence in THREEWAY STEEL.

1. Straight seam steel pipes should be submitted for acceptance in batches, and the batching rules should comply with the provisions of the corresponding product standards.2. The inspection items, sampling quantities, sampling locations, and test methods of straight seam steel pipes shall be by the

The annealing of straight seam steel pipe is to heat the steel pipe to a temperature and keep it warm at this temperature and then slowly cool it to room temperature. There are several types of annealing, such as annealing, spheroidizing annealing, and stress relief annealing.1. Heating the steel pi

1. Organize relevant operators, be familiar with construction drawings and regulations, formulate welding procedures, and compile welding operation instructions.2. Welders should be trained in corresponding projects and have operation qualification certificates for corresponding projects.3. Check wh

Thick-walled welded pipe is a kind of precipitation-strengthened nickel-based superalloy that is difficult to deform. It is similar in composition to the former Soviet Union's ЭИ929 alloy. The solid solution strengthening of alloy elements and the precipitation strengthening of γ' phase are very hig

Project Location: South Africa.Product: seamless steel pipe.Specifications: 4''*10m*SCH80.Application: oil drilling.Arrival time: 07.01.2022.The pipes have arrived in South Africa and were put into project use. Many cooperations have given the customer full confidence in THREEWAY STEEL.