Qingdao NPA Industry Co., Ltd.

Rm. 2802B, Agora Mansion, No. 234, Yan'an 3rd Road, 266000 Qingdao
China
Telephone +86 532 83863918
Fax +86 532 87317877
info@npa-china.com

Hall map

glasstec 2018 hall map (Hall 12): stand F73

Fairground map

glasstec 2018 fairground map: Hall 12

Our range of products

Product categories

  • 01  Glass production/Production Technology
  • 01.09  Kiln technology
  • 01.09.03  Annealing lehrs, continuous/intermittent operation

Annealing lehrs, continuous/intermittent operation

Our products

Product category: Annealing lehrs, continuous/intermittent operation

Electric radiant tube

Electric radiant tube:used for continuous annealing line and galvanizing line and is famous for its uniform heating and controllable temperature.
The outer tube: centrifugal casting
Internal heating: electric heating core.
The general diameter: OD203mm, OD216mm,etc.
Common material: ZG40Cr25Ni20Si2

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Product category: Annealing lehrs, continuous/intermittent operation

U-type radiant tube

U-type radiant tube:used for continuous annealing, galvanizing line of vertical annealing furnace. In nitrogen and hydrogen protection atmosphere, burning of natural gas or coke oven gas inside the tube heat the strip steel from room temperature to 750-950℃quickly and evenly through the outer tube radiation heat transfer for the annealing treatment. The straight tube sections are centrifugal castings, and the tube fittings are static castings.

Common material:ZG45Ni48Cr28W5Si2, MORE1, MORE2

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Product category: Annealing lehrs, continuous/intermittent operation

W type radiant tube

W type radiant tube:mostly used on continuous annealing, vertical annealing furnace of galvanizing lines. In the nitrogen and hydrogen protection atmosphere, burning of natural gas or coke oven gas inside the tube heat the strip steel from room temperature to 750-950℃quickly and evenly through the outer tube radiation heat transfer for the annealing treatment. The straight tube sections are centrifugal castings, and the tube fittings are static castings.
Common material:
ZG40Cr25Ni20Si2,ZG40Ni35Cr25Nb, ZG45Ni48Cr28W5Si2, ZG30Cr25Ni12, etc.

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About us

Company details

Qingdao NPA Industry Co. Ltdis a leading manufacturer specializing in centrifugally cast tube and static castings in heat resistant alloys. Our products include ethylene cracking furnace tubes, reformer furnace tubes, CAL(continuous annealing lines) &CGL(continuous galvanizing lines) furnace rollers and radiant tubes, glass lehr rollers and heat/wear resistant castings. Our annual capacity is 9000 tons centrifugal castings and 3500 tons static castings (500 tons precision castings). NPA cast products have been widely used by many international petrochemical, engineering and metallurgy companies.
NPA has a long history in heat resistant alloy development and production. During the 1970’s Shandong Jinxiang Stainless Steel Plant was formed to produce centrifugal castings. The core production team was composed of the first generation of centrifugal casting professionals in China.
In 2004 a new factory was opened as Yantai Zhongtuo to specialise in the production of tubes and fittings for the petrochemical industry in China.
In 2011, in order to increase manufacturing capacity, a new plant was built based on the experience from the previous two plants using the latest technology and new equipment designs. The company was rebranded as Qingdao NPA Industry  Co Ltd
         NPA is a private share holding company founded by professional engineers and experts. Most of them have been in the heat resistant furnace roller and tube industry for about 30 years and have contributed to the development of materials for ethylene cracking furnace, hydrogen reformer furnace, steel strip continuous annealing lines and continuous galvanizing lines and float glass lines in China. Most of the management and technicians have more than 15 years experience of manufacturing heat resistant alloy centrifugal and static castings. The accumulated rich experience and valuable technological knowledge have resulted in the development of our own patented technology and knowhow. NPA is now one of the biggest and most advanced equipped companies in China with high level technology and quality, and we strive to provide best turn-key solution for customers based on the market demand.
NPA has a strong R&D ability and has been working closely and extensively with several scientific research institutes and colleges to develop relevant products.

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