Industry News_Haiguan_High and medium pressure hydraulic pipe joint

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2018-06

The pipe fittings industry has promising prospects for future development.

First, a multi‑faceted ring shell with a polygonal cross‑section or a multi‑faceted sectorial shell closed at both ends is welded. After the interior is filled with a pressurized medium, internal pressure is applied; under this pressure, the polygonal cross‑section gradually transforms into a circular shape, ultimately forming a circular ring shell. When selecting stamped elbows, careful attention must be paid to material selection, as the choice of material can, to a certain extent, determine the overall quality of the pipeline. Elbows are classified by angle into three standard types—45°, 90°, and 180°—with additional non‑standard angles such as 60° also available depending on project requirements. Materials used for elbows include cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non‑ferrous metals, and plastics. With future technological advancements and evolving operating conditions, new demands will arise regarding the physicochemical properties of pipe fittings. Consequently, more specialized pipe‑fitting varieties tailored to diverse service environments are expected to emerge, requiring manufacturers to continuously develop innovative products in response to market needs. Over the foreseeable future, large‑scale downstream industries such as construction and machinery—key consumers of wear‑resistant elbows—will continue to play a vital role in China’s industrialization and urbanization processes. The growth and transformation of these sectors depend critically on the support provided by wear‑resistant elbows. As downstream industries undergo upgrading and modernization, the market for elbow production remains vast and full of potential. China has already become a global hub for the production and consumption of elbows. With the ongoing advancement of industrialization and urbanization, China’s elbow industry is poised to become even more modern and environmentally sustainable.

2018-06-06

The pipe fittings industry has promising prospects for future development.

2015-04

The widespread use of pipe fittings abroad

Steel pipe (or black iron pipe) was once the more popular choice for conveying water and combustible gases. Steel pipe is still widely used in many homes and businesses to transport natural gas or propane fuel, and it serves as a highly favored heat‑resistant material in automatic sprinkler systems. In commercial buildings, fittings are employed to convey heating or cooling water, as well as in heat exchangers, air‑conditioning systems, variable‑air‑volume (VAV) air‑handling units, and other HVAC equipment. Steel pipes are joined by threaded connections; sometimes tapered threads are cut at the pipe ends (see National Pipe Thread), and sealing agents—such as thread‑sealing compounds or thread‑sealing tape (also known as PTFE tape)—are applied.

2015-04-05

The widespread use of pipe fittings abroad

2013-03

Working capacity of the elbow joint

The working performance of an elbow is closely related to its stress state. Both theoretical calculations and on-site measurements of the operating stresses in pipe fittings reveal that the arc‑starting point of the elbow is particularly sensitive to external loads. Apart from internal pressure and self‑weight, the primary external loads arise during pipeline startup—namely, thermal expansion of the pipe metal, pipeline vibrations, and abnormal behavior of supports and hangers. A push‑forming machine employs a horn‑shaped mandrel or core rod that gradually widens from the tip toward the base. The forming process involves diameter expansion combined with bending, with rear support provided to maintain stability. For stainless steel pipe fittings, the blank pipe section is slipped over the mandrel, while a gantry frame secures the mandrel at the rear. A carriage positioned between them may be driven hydraulically or mechanically.

2013-03-30

2013-03

Steel prices on the international market are volatile.

Stainless steel pipe fittings on the market are referred to as a systematic category, encompassing stainless steel elbows, tees, crosses, reducers, caps, and more. Based on their connection methods, they can be classified into four types: socket‑type, threaded, flanged, and welded fittings. Stainless steel elbows are used at pipe bends; flanges are components that join pipes end‑to‑end; stainless steel tees are employed where three pipes converge; stainless steel crosses are used where four pipes meet; and stainless steel reducers connect pipes of different diameters. According to relevant…

2013-03-30

Steel prices on the international market are volatile.

2013-03

Introduction to Pipe Fittings in China

In China, fittings with a nominal pressure rating (DN) of ≥16 MPa are classified as high-pressure fittings. These fittings are used in specialized applications such as high-pressure steam equipment, high-temperature and high-pressure chemical pipelines, pressure vessels in power plants and nuclear power stations, and components for high-pressure boilers. For pipes and fittings with a nominal diameter (DN) of ≤40, since their wall thickness is typically quite thin, butt welding can result in significant misalignment, increase the risk of burn-through, and make it difficult to ensure consistent weld quality. Therefore, butt welding is generally avoided in such cases. For the same product, the material weight differs: machining requires 10.35 kg, whereas using pipe fittings reduces this to 9.32 kg, resulting in savings of…

2013-03-30

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Haiyan County Haiguan Pipe Fittings Manufacturing Co., Ltd.

Telephone: +86 0573-86404566

WhatsApp: +86 15958309183

English domain name:www.hyhgc.cn

Chinese domain name: ChinaMarineRegulation.website

Address: South side of Changfeng Road, Qingshan Subdistrict, Haiyan County, Jiaxing City, Zhejiang Province, China

Email: haiguan@hyhgc.cn

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