Quality Assurance

China Piping products manufacturer Bangdong strictly carry out rigorous quality control and products inspection to ensure continual quality flanges and pipe fittings. As one of the manufacturers in China piping products filed ,Bangdong always abide by the principle of “Quality First”.

Quality Control Process :


Bangdong produce high quality piping products including steel pipe fittings and forged flanges with the adoption of the most advanced technologies and equipment in the world now.

Inspection: With complete inspection facilities and high experienced inspector, we can execute dimensions checking, chemical analysis, mechanical testing, hardness testing, Positive Material Identification, NDT (including UT, MT,RT), and Hydro testing, etc, we can guarantee the quality as per different requirements from customer.

Quality Management: With the quality assurance systems as ISO9001-2015, Our company have been carrying out design, research and production in a correct way.

Raw materials control: Besides review of raw materials certificate from the supplier, we also carry out chemical and mechanical inspections for quality verification. We will purchase raw materials from our approved suppliers, if exceeds the range, the relevant qualification procedures must be approved by our quality department first.

Visual inspection in production: Appearance of products in every procedure shall be visual inspected. If there is any deformation or damage found , this product shall be rejected.

Trace ability: From raw material to semi-finished products and finished products, good trace ability records always are kept.
Random inspection for semi-finished products: In each procedure, the random inspection for semi-finished products shall be carry out.

NDT: MPI shall be applicable to each piece of fittings made by cold forming method. 100% RT shall be done on weld seam of welded products. Other NDE tests shall be as per clients’ demand and all NDT tests shall only be executed after heat treatment.

Dimensions : Sizes and angles for each product shall be inspected according to relevant standard tolerance ranges

Material grade verification: color coding shall be made full use of in this regard.

Storage & Delivery: Detailed storage and shipping plan shall be submitted to customers before delivery to ensure the package meet the requirements and delivery safely and quickly.

Third party inspection: we also accept any third party inspection appointed by our customers, such as Loyd’s Register, BV, SGS, TUV, DNV and etc.

Bangdong has get involved in the piping products for long time. With the experience  in production and operation, we are more competitive in this line. We can absolutely understand what you need and definitely meet your satisfaction .

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Our quality assurance principles support our working :
Strive to manufacture and supply perfect products.
Strive to cooperate with our clients, suppliers and partners.
Strive to become the best in our field.