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Elbow

elbow

 

Steel elbows are key pipe fittings used to change the direction of pipelines. They are curved in shape, available in a variety of angles, and compact in structure, making them easy to install in places with limited space. They have good strength, toughness, and fatigue resistance, can be hot-bent or cold-bent, have good weldability, high surface quality, and a variety of anti-corrosion measures, and are widely used in pipeline systems in multiple industries.

 


Category:    elbow

Key word:    elbow


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Product details:

Production Name 45 / 90 / 180 , Long / Short Radius Elbows, Equal / Reducing Crosses, Concentric / Eccentric Reducers, Caps, Stub Ends
Size Range From ½” up to 72″ From 1/2 to 30 (Seamless Pipe Fittings),Form16
to 72(Seam Pipe Fittings)
Schedule SCH STD, XS, XXS, SCH 10 ~ SCH 160
CARBON STEEL ASTM A234 WPB, WPC; ASTM A420 WPL9, WPL3, WPL6,
WPHY-42
WPHY-46, WPHY-52, WPHY-60, WPHY-65, WPHY-70,
ALLOY STEEL ASTM A234 WP1, WP11, WP12, WP22, WP5, WP9, WP91
 SPECIAL ALLOY Inconel 600, Inconel 625, Inconel 718, Inconel X750, Incoloy 800,
Incoloy 800H, Incoloy 825, Hastelloy C276, Monel 400, Monel K500
WPS 31254 S32750, UNS S32760
 STAINLESS STEEL ASTM A403 WP304/304L, WP316/316L, WP321, WP347, WPS 31254
5 Duplex$super duplex stainless steel ASTM A 815 UNS S31803, UNS S32750, UNS S32760
STANDARDS ANSI, ISO, JIS, DIN, BS,GB, SH, HG,QOST,ETC.
CE and certification: ISO9001:2000 , API , BV , SGS, LOIYD
Applications range: Petroleum, chemical, power, gas, metallurgy, shipbuilding.construction
,water and nuclear power etc.
Packaging: seaworthy package,Plywood Cases or pallet or as per customers
requirement
Quality high lever
The third party inspection: BV,SGS,LOIYD,TUV,and other party alloyed by clients.
Delivery Time: At the earliest ,within the period required by customer.
Remark: Also can supply IBR fittings and Specialized NACE & HIC Fittings.

Application:

Steel elbows play a key role in many fields. In the petrochemical pipeline system, a large number of used to change the direction of the pipeline, so that the complex process can be smoothly connected, its good corrosion resistance and pressure resistance to adapt to all kinds of chemical media and high pressure environment. When installing building plumbing pipes, steel elbows are indispensable, which can flexibly build pipeline layout to achieve efficient transmission and distribution of hot and cold water. In the heating system, the heating pipeline can bypass obstacles and ensure that heat is evenly distributed to various areas. In industrial ventilation pipeline engineering, steel elbows are used to change the direction of the airflow, optimize the ventilation effect, and ensure smooth air circulation and suitable environment in workshops and other places.

1. Shape and structural characteristics

Curved shape: The most notable feature of steel elbows is their curved shape. It can change the direction of the pipeline, allowing the pipeline system to be flexibly laid out according to the actual installation environment and design requirements. The bending angles of elbows are various, the common ones are 45°, 90° and 180°, among which the 90° elbow is the most widely used. For example, in building water supply and drainage systems, 90° elbows are used to connect vertical and horizontal pipes to achieve diversion of water flow.

Compact structure: The elbow itself has a relatively compact structure and takes up little space. Compared with turning by splicing multiple straight pipes, it can complete the change of pipe direction in a limited space, which is very beneficial for installation environments with limited space (such as ship piping systems, machine room piping systems, etc.).

2. Mechanical performance characteristics

Good strength and toughness: Steel elbows have high strength and can withstand the pressure of the medium inside the pipeline. Its tensile strength and compressive strength can be adjusted according to the material and manufacturing process of the steel. At the same time, it also has a certain degree of toughness, which can effectively prevent rupture when subjected to external impact or vibration of the pipeline system. For example, in a high-pressure steam pipeline system, elbows need to withstand the force of high-temperature and high-pressure steam. The strength and toughness of steel elbows can ensure the safe operation of the system.

Fatigue resistance: In pipeline systems that are subject to long-term pressure fluctuations and fluid impact, steel elbows show good fatigue resistance. Due to its uniform internal structure, the material has a high fatigue resistance limit and can withstand multiple stress cycles without fatigue damage. This is very important in pipeline transportation systems in the chemical, petroleum and other industries, because the flow of media in these systems usually produces frequent pressure changes and impact forces.

3. Processing technology characteristics

Various processing methods: Steel elbows can be manufactured through various processing methods such as hot bending and cold bending. Hot bending is to bend steel after heating it to a certain temperature. This method is suitable for making elbows with larger pipe diameters and thicker pipe walls, and can effectively avoid cracks in the material during the bending process. Cold bending is performed at room temperature. It is suitable for elbows with smaller pipe diameters and thinner pipe walls. The processed elbows have higher dimensional accuracy. For example, for some instrument piping systems with high precision requirements, cold-formed steel elbows can better meet installation accuracy requirements.

Good weldability: Steel elbows generally have good weldability. This makes it easy to weld and connect with other pipe fittings such as straight pipes, tees, and crosses during the installation of the pipeline system. The welded elbow can form an integral part with the pipeline system to ensure the sealing and mechanical properties of the pipeline. In the on-site installation of petrochemical pipelines, welded steel elbows can flexibly adjust the pipeline layout according to actual conditions while ensuring the safety and reliability of the pipeline system.

4. Surface quality and anti-corrosion characteristics

High surface quality: The processed steel elbow has a smooth and flat surface. For some pipeline systems with higher requirements (such as pipelines in the food and pharmaceutical industries), smooth surfaces can reduce the residue and dirt accumulation of media at elbows, which is beneficial to maintaining the cleanliness of the media in the pipeline. At the same time, good surface quality is also conducive to subsequent anti-corrosion treatment.

Various anti-corrosion measures: In order to adapt to different usage environments, steel elbows can adopt a variety of anti-corrosion measures. Such as painting, galvanizing, lining, etc. Painting is a simple and effective anti-corrosion method. By applying anti-corrosion paint on the surface of the elbow, it can isolate air and moisture and prevent the steel from rusting. Galvanized elbows are coated with a layer of zinc on the surface through electrochemical methods. The zinc layer will be corroded before the steel in a corrosive environment, thus playing a protective role. For some highly corrosive media, lining can also be used, such as lining the inside of the elbow with corrosion-resistant materials such as plastic and rubber.

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        Plate package

        steel plates together using steel bands and then wrapped in waterproof paper or plastic sheets to protect against moisture and corrosion

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        Steel coils are wrapped in waterproof paper or plastic sheeting and sometimes further protected with metal sheet covers.

        Pipe package

        Pipes are usually bundled together and strapped. Ends are often capped to prevent damage and ingress of dirt,anti-corrosion measures.

        Rod package

        The bundles are then wrapped with waterproof material, and sometimes, anti-rust oil or coatings to prevent corrosion.

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        Use containers that are dry and clean. Inspect for any damage that might compromise the integrity of the steel products.

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        Observe the microstructure of steel products and evaluate their properties and quality.

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        Analyze the chemical composition of steel to assist in quality control identification.

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        Accurately measure the size of steel to ensure that it meets the requirements for use.

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        Test the impact toughness of steel products to ensure the safety of our products.

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        It is more intuitive to find the hole defects on the surface of steel by the penetration method.

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        Measure the corrosion resistance of steel with an instrument and predict its service life.

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