About Us

Mainline Trade is an enterprise group integrating the production, distribution and exportation of valves, pipe fittings, flanges and other related accessories in the field of municipal water supply and drainage, irrigation, HVAC system, firefighting, as well as petrochemical industries. Our group members are:

Beijing Ruoze International Business and Trade Co., Ltd

Shandong Jinggao Valves Industry Co., Ltd

Shanxi Taigu Tianhe Pipe Industry Co., Ltd.

Our factories are located in Taigu of Shanxi province, which is known as the city of malleable iron. The production base covers an area of over 100 000 square meters, with the building area of more than 60 000 square meters. Our annual output is over 60 000 tons of pipe fittings (malleable iron, ductile iron, cast steel, etc.), valves and various casting products. We have more than 1000 employees and over 500 production facilities, which include 4 automatic molding production lines, 2 semi-automatic production lines, 4 medium frequency electric furnaces and 5 sets of electric heating galvanizing furnaces etc.

office-mainlinetrade valve and fittings

m2 of production base

tons of annual output


production facilities

production facilities

We have built a network of high-precision processing center, equipped with the all-in-one engraving machine, the precision CNC machine and other complete set of mold processing machines.

physical & chemical testing centre

A physical and chemical testing center is also built, which is equipped with advanced physical and chemical testing equipment, such as carbon and sulfur analyzer, hydraulic universal testing machine and spectrometer, etc.

mainline valve and fittings-swiss arl spectrograph
swiss ARL spectrograph
mainline valve and fittings-elctrol hydraulic testing machine
uSA mts electro-hydraulic servo testing machine
mainline valve and fittings-cs9900 carbon sulfur analyzer
CS9900 Carbon-sulfur analyzer

product quality & certifications

Our products have the advantages of high precision, high pressure resistance and nice appearance. They have been certified by UL, FM, CE, ISO9001, etc., and are widely used in construction, firefighting, gas, water supply and drainage, petroleum, chemical industry, water heating, water conservancy mechanical equipment and other pipeline engineering fields.


production capacities

The annual output of 60,000 tons plus the standing stock all over the country enables us to meet the market demand to the maximum extent. Since established in 2005, our products are sold throughout China and exported to the southeast Asia, the middle east, Europe, Africa, the United States and some other countries and regions, and enjoy a high reputation among our customers.

mainline-production of couplings

our strategic partners

mainline trade partner-mech casting group
mainline trade partner-hebei jianzhi casting group
mainline trade partner-feiya plastic
mainline trade partner-syshow valve pipes

We have established long-term strategic partnerships with many leading companies in related industries. Therefore, we have a reliable and stable supply capacity, can provide high quality products at competitive prices, and provide quality assurance and after-sales service for the products we manufacture and distribute.

our advantages