Principles for the selection of commonly used steel pipe materials for pressure pipelines:
When designing pressure piping, after the pipe diameter is determined by calculation, the material of the pipe must be selected. The use of commonly used pipe materials for pressure pipelines is determined by the operating conditions (such as pressure and temperature) of the conveyed medium and the characteristics of the medium under these conditions.
Improper selection of materials can cause waste or bury hidden dangers of accidents. For example, pipes of common materials can be used, and pipes of more expensive materials are used, which increases unnecessary capital investment. The use of carbon steel in the occasions where there is acid-resistant stainless steel will directly affect the normal operation of the pressure pipeline, and even leave the bane. Therefore, when selecting the pipe material, the designer is required to first understand the type, specification, performance, and scope of use of the pipe. It is best to investigate the application of the pipe in other similar pressure pipes, and then determine the material of the pipe according to the following principles.
(1) Preferred pipe
When selecting pipe materials, generally metal materials should be considered first, and non-metal materials should be considered when metal materials are not applicable. Steel pipes are preferred for metal materials, and non-ferrous metal materials will be considered later. Among steel pipes, carbon steel should be considered first, and stainless steel should be used when it is not applicable. When considering carbon steel materials, first consider welded steel pipes, and then choose seamless steel pipes when not applicable.
(2) The influence of medium pressure
The higher the pressure of the conveying medium, the thicker the wall thickness of the pipe, and the higher the requirements for the pipe material.
When the medium pressure is above 1.6MPa, seamless steel pipes or non-ferrous metal pipes can be used. When the pressure is very high, such as in the production of synthetic ammonia, urea and methanol, the pressure of some pipes is as high as 32MPa. Generally, 20# or 15CrMo high-pressure seamless steel pipes are used. The pipes on the vacuum equipment and the oxygen pipes when the pressure is greater than 10MPa generally use copper pipes and brass pipes.
When the medium pressure is below 1.6MPa, welded steel pipes, cast iron pipes or non-metallic pipes can be considered. However, the pressure of the cast iron pipe withstand the medium shall not be greater than 1.0MPa. The medium pressure that the non-metallic pipe can withstand is related to the variety of non-metallic materials, such as unplasticized polyvinyl chloride pipes, whose working pressure is less than or equal to 1.6MPa; reinforced polypropylene pipes, whose working pressure is less than or equal to 1.0MPa; ABS pipes, whose working pressure is less than or equal to 1.0MPa. Less than or equal to 0.6MPa.
For water pipes, when the water pressure is below 1.0MPa, the welded steel pipe of Q235A is usually used; when the water pressure is greater than 2.5MPa, the seamless steel pipe of 20# is generally used.
(3) The influence of medium temperature
Tubes of different materials are suitable for different temperature ranges. For hydrogen with a pressure of 1.0MPa, when the hydrogen temperature is less than 350°C, 20# seamless steel pipes are generally used, and when the hydrogen temperature is in the range of 351~400°C, 15CrMo or 12CrMo seamless steel pipes are generally used.
(4) The influence of the chemical properties of the medium
Conveying different media, using different pipes. Some mediums are neutral, and generally do not require high materials, so ordinary carbon steel pipes can be selected; some mediums are acidic or alkaline, and acid-resistant or alkali-resistant pipes must be selected. Strong acid and strong base and weak acid and weak base have different requirements for the use of pipes. The same acid or alkali has different requirements for the material of the pipe with different concentrations. For transporting water and water vapor, a pipe made of carbon steel is sufficient. For example, in the urea plant, the pipes for conveying carbon dioxide generally use stainless steel pipes, because carbon dioxide meets water to form carbonic acid, which has a corrosive effect on general steel pipes. For example, carbon steel pipes can be used for fuming sulfuric acid, but carbon steel pipes should not be used for dilute sulfuric acid. Because dilute sulfuric acid and carbon steel can react chemically and corrode carbon steel, duralumin pipes can be used.
(5) The influence of the function of the tube itself
In addition to the function of transporting the medium, some pipes also have the function of shock absorption, coefficient of thermal expansion and contraction, and the function of frequent movement under working conditions, such as civil liquefied petroleum gas, oxygen, and acetylene gas. Whereas, high-pressure steel wire braided rubber hoses are often used for pipes, instead of hard steel pipes that are inconvenient to move.
(6) The influence of pressure drop
After the initial selection of the pipe material, the pressure drop of the pipe must be calculated to determine the inner diameter of the pipe. Through the calculation of pressure drop, see whether the selected material meets the requirements. Especially when initially selecting plastic pipes, more attention should be paid to the review of pressure drop.
In the calculation of pressure pipelines, in engineering design, material balance, energy balance and equipment calculation are generally carried out according to the production scale, and the material flow rate is initially determined. And refer to the relevant information, assume a material flow rate, calculate the inner diameter of the pipe, check the manual or standard, and select the standard pipe. The inner diameter of the standard pipe usually selected should be equal to or slightly larger than the calculated pipe inner diameter. Then calculate the pressure drop of the pipeline.
#20 Seamless Steel Pipes: The 20 in #20 steel refers to the carbon content, and the carbon content is 0.2%, which is a low-carbon steel. The yield strength is 245Mpa, and the tensile strength is 410Mpa.
Glass Reinforced Plastics (GRP) are a composite consisting of at least two different materials.
The benefits of each material are united to achieve an overall effect.Glass Reinforced Plastic pipes are produced from glass reinforcements that are embedded in cured thermosetting resin.
GRP invaded the piping industry due to its corrosion resistance capabilities and have been preferred as alternative to steel and stainless-steel pipes.Global GRP (Glass Reinforced Plastic) Piping market size will increase to 8570 Million US$ by 2025, from 5800 Million US$ in 2018, at a CAGR of 5.0% during the forecast period.
In this study, 2018 has been considered as the base year and 2019 to 2025 as the forecast period to estimate the market size for GRP (Glass Reinforced Plastic) Piping.Download FREE Sample of this Report @ https://www.grandresearchstore.com/report-sample/global-grp-piping-2025-96This report researches the worldwide GRP (Glass Reinforced Plastic) Piping market size (value, capacity, production and consumption) in key regions like United States, Europe, Asia Pacific (China, Japan) and other regions.This study categorizes the global GRP (Glass Reinforced Plastic) Piping breakdown data by manufacturers, region, type and application, also analyzes the market status, market share, growth rate, future trends, market drivers, opportunities and challenges, risks and entry barriers, sales channels, distributors and Porter’s Five Forces Analysis.The following manufacturers are covered in this report:Veplas d.d.Enduro CompositesHarwal GroupGraphite IndiaSaudi Arabian Amiantit Company (SAAC)Sarplast SAComposite Pipes Industry (CPI)HOBASDubai Pipes FactoryFibrexFuture Pipe IndustriesGRP (Glass Reinforced Plastic) Piping Breakdown Data by TypeEpoxyPolyesterVinyl EsterGRP (Glass Reinforced Plastic) Piping Breakdown Data by ApplicationOil and GasChemicalsWaste WaterIrrigationWater SupplyGRP (Glass Reinforced Plastic) Piping Production Breakdown Data by RegionUnited StatesEuropeChinaJapanOther RegionsGRP (Glass Reinforced Plastic) Piping Consumption Breakdown Data by RegionNorth AmericaUnited StatesCanadaMexicoAsia-PacificChinaIndiaJapanSouth KoreaAustraliaIndonesiaMalaysiaPhilippinesThailandThe study objectives are:To analyze and research the global GRP (Glass Reinforced Plastic) Piping capacity, production, value, consumption, status and forecast;To focus on the key GRP (Glass Reinforced Plastic) Piping manufacturers and study the capacity, production, value, market share and development plans in next few years.To focuses on the global key manufacturers, to define, describe and analyze the market competition landscape, SWOT analysis.To define, describe and forecast the market by type, application and region.To analyze the global and key regions market potential and advantage, opportunity and challenge, restraints and risks.To identify significant trends and factors driving or inhibiting the market growth.To analyze the opportunities in the market for stakeholders by identifying the high growth segments.In this study, the years considered to estimate the market size of GRP (Glass Reinforced Plastic) Piping :History Year: 2014–2018Base Year: 2018Estimated Year: 2019Forecast Year 2019 to 2025For the data information by region, company, type and application, 2018 is considered as the base year.
Whenever data information was unavailable for the base year, the prior year has been considered.Get the Complete Report & TOC @ https://www.grandresearchstore.com/chemicals-and-materials/global-grp-piping-2025-96Table of contentGlobal GRP (Glass Reinforced Plastic) Piping Market Research Report 2019–2025, by Manufacturers, Regions, Types and Applications1 Study Coverage1.1 GRP (Glass Reinforced Plastic) Piping Product1.2 Key Market Segments in This Study1.3 Key Manufacturers Covered1.4 Market by Type1.4.1 Global GRP (Glass Reinforced Plastic) Piping Market Size Growth Rate by Type1.4.2 Epoxy1.4.3 Polyester1.4.4 Vinyl Ester1.5 Market by Application1.5.1 Global GRP (Glass Reinforced Plastic) Piping Market Size Growth Rate by Application1.5.2 Oil and Gas1.5.3 Chemicals1.5.4 Waste Water1.5.5 Irrigation1.5.6 Water Supply1.6 Study Objectives1.7 Years Considered2 Executive Summary2.1 Global GRP (Glass Reinforced Plastic) Piping Production2.1.1 Global GRP (Glass Reinforced Plastic) Piping Revenue 2014–20252.1.2 Global GRP (Glass Reinforced Plastic) Piping Production 2014–20252.1.3 Global GRP (Glass Reinforced Plastic) Piping Capacity 2014–20252.1.4 Global GRP (Glass Reinforced Plastic) Piping Marketing Pricing and TrendsCONTACT US:276 5th Avenue, New York , NY 10001,United StatesInternational: (+1) 646 781 7170 / +91 8087042414Email: [email protected] Us On linkedin :- https://www.linkedin.com/company/grand-research-store/
