ASTM A139 spiral wound steel pipe

Product Details

ASTM A139 spiral wound steel pipe Complete spot check of weldsAlthough there is welding process assessment to ensure the performance of the welding joint, but the welding process assessment is carried out in the laboratory conditions of simulation, so the actual engineering welding quality and performance, must be cut on the site of the project flow welding joint to conduct damage inspection to know.Now some pipelines are carried out a certain proportion of the destructive spot inspection of the pipe mouth in the construction stage.There is a precedent that the entire nearly completed pipeline was excavated and rewelded due to unqualified pipe mouth spot check and further unqualified welding materials.

Brief Introduction

steel spiral pipe machinery

ASTM A139 spiral wound steel pipe Although there is welding process assessment to ensure the performance of the welding joint, but the welding process assessment is carried out in the laboratory conditions of simulation, so the actual engineering welding quality and performance, must be cut on the site of the project flow welding joint to conduct damage inspection to know.Now some pipelines are carried out a certain proportion of the destructive spot inspection of the pipe mouth in the construction stage.There is a precedent that the entire nearly completed pipeline was excavated and rewelded due to unqualified pipe mouth spot check and further unqualified welding materials.

L290 spiral steel pipe is an important structural part of machine tools

Heat treatment condition of L290 spiral steel pipeI. low temperature tempering (150-250 degrees)The tissue obtained by low temperature tempering is tempered martensite.The purpose of this method is to reduce the quenching stress and brittleness on the premise of maintaining the high hardness and wear resistance of quenched steel, so as to avoid cracking or premature damage.It is mainly used for various high-carbon cutting tools, measuring tools, GB/T9711.1 pipe pipe, rolling bearing and carburized parts, etc., the hardness after tempering is generally hrc58-64.The tissue obtained from moderate tempering is tempered troostite.

The aim is to obtain high yield strength, elastic limit and toughness.Therefore, it is mainly used for various GB/T9711.1 pipe and hot die treatment, temper hardness is generally hrc35-50.Iii. High temperature tempering (500-650 ° c)The tissue obtained by high temperature tempering is tempered soxhlet.The heat treatment combining quenching with high temperature tempering is commonly called quenching and tempering treatment, whose purpose is to obtain the comprehensive mechanical properties with good strength, hardness, plasticity and toughness.

So it's widely used in cars,GB/T9711.1 pipelines, steel pipes, machine tools and other important structural parts, such as connecting rods, bolts, gears and shafts.The hardness after tempering is generally hb200-330.

The Process Flow

The Application

The Workshop

Cangzhou Steel Pipe Group (CSPG)Co.,Ltd.

 has more than ten years history company which located in Lecong Iron and Steel World, a well-known steel distribution center in China, with superior geographical position and convenient water and land transportation. 

We are a direct-selling manufacturer specializing in the research and development of spiral steel pipes, steel coiled pipes, anti-corrosion steel pipes inside and outside. Since its inception, the company has been guided by a brand-new thinking of steel pipe product market based on the business philosophy of honesty, pragmatism and knowledge-seeking.