Concentric Reducer

Concentric Reducer is a kind of connecting pipe fitting commonly used in industrial pipeline systems. It is mainly used to connect two pipes of different diameters to make the pipeline fluid transition smoothly. Its structural feature is that the large diameter and the small diameter are on the same center line, that is, the concentric structure. It is often used in pipeline connection occasions that require precise transition and smooth fluid flow. The design of Concentric Reducer ensures that the pressure loss of the fluid is minimized when it flows in the pipeline, avoids the occurrence of unstable flow or turbulence, and has excellent fluid transmission efficiency. They are usually used in pressure pipelines, water supply systems, oil pipelines and fluid transportation pipelines, especially in occasions where the pipeline flow or flow rate needs to be changed. 

Pipe Fitting Manufacturing Process:

Cutting: Precisely size pipes to design specifications.

Forming: Shape via cold pressing, hot bending, or die forging methods.

Welding (segmented parts): Perform joint welding followed by weld seam polishing.

Heat Treatment: Mitigate internal stresses and optimize material strength.

Surface Treatment: Apply sandblasting, electroplating, or corrosion-resistant coatings.

Inspection: Validate dimensions, conduct pressure endurance tests, and execute non-destructive testing (NDT) for compliance certification.

How do we ensure the quality of pipe fittings?

1. Raw material control

Secondary verification ensures reliability

The raw materials we use are all from well-known domestic steel mills such as Baosteel, Qingshan, and Yongxin, with stable and reliable quality. Each batch of materials must be accompanied by a material warranty (MTC) and a positive material identification test (PMI) report before arriving at the factory. After arrival, we will conduct PMI analysis and related inspections again to double-verify its chemical composition and material properties to ensure that it meets production standards and customer needs.

2. Production process management

Full process tracking and quality control

Hongdi is equipped with advanced processing equipment, including CNC lathes, automatic laser cutting equipment, 1,000-ton hydraulic forming machines, elbow mandrel pushers and other key equipment. Each process is strictly controlled by experienced engineers and technicians. Quality inspectors track and take photos of key nodes throughout the process, and use standardized process flow cards for operation guidance to ensure that the products are traceable and consistent.

3. Inspection before delivery

Full inspection before delivery

MTSCO's quality inspection team conducts strict inspections on each finished product, including appearance inspection, PMI verification, size verification, quantity confirmation and non-destructive testing. According to product requirements, we will also carry out in-depth laboratory projects such as mechanical property testing, chemical analysis, and intergranular corrosion testing. For welded pipe fittings, raw materials and finished products must pass 100% ultrasonic or radiographic non-destructive testing.

In addition, we support independent audits by third-party inspection agencies such as SGS, TUV, and BV.

MTSCO has rich operating experience in packaging and container transportation. Large pieces are wrapped in plastic wrap, small pieces are sealed with foam film or plastic, and pearl cotton is added to the port position for protection. The outer packaging is handled with wooden boxes or pallets, and the container is reinforced with wooden strips and ropes to ensure transportation safety. All inspection data and packing processes are recorded and archived with photos to meet customer traceability requirements.