CHENGYE
PIPELINE FLANGE MANUFACTURER
Welcome to our site!
Confidence stems from the strength, and credibility casts brand!


We are a specialized forged flange and forging manufacturer which has been audited and approved by ISO9001 QMS, accredited by German TUV AD-WO/TRD100, European PED.
We also accept the 3rd Party Inspection to our factory for the inspection of our products.
more infoRaw Material
Quality is the life of enterprise! The raw material is most important for the quality of product.
We purchase the raw material of flange from three major steel companies in China:
- a. The stainless steel and alloy steel are purchased from Taiyuan Iron and Steel Group.
- b. The carbon steel and low temperature steel are purchased from Baotou Iron and Steel Group.
- c. The special steel such as duplex stainless steel, super stainless steel and nickel-based alloy from Shanghai Baosteel Group.
Technical Data
Dimensions of Ring-Joint Facings for RTJ Flanges
Unit: mm Nominal Size Diameter of Raised Portion, K Groove D Continue Reading
SPECIFICATION FOR NACE MR0175
5.1. Carbon steel plates (including plates for heads) The fo Continue Reading
Class 150 Welding Neck Flange RF
Unit: mm NPS SCH mm O R t h X A Y B W I n kgs/pc 0.5 10 2.11 Continue Reading