What is grade-A boiler?
In the industrial boiler industry, it is generally divided into four grades: A, B, C and D according to the production qualification license grade, among which, when purchasing boilers, users often consider Grade A boiler manufacturers. What is a grade A boiler?
The production license scope of Grade A qualification is not limited.
Grade B steam boiler with rated steam pressure less than or equal to 2.5 MPa.
Grade C steam boiler with rated steam pressure less than or equal to 0.8 MPa and rated evaporation less than or equal to 1 ton/hour; Hot water boiler with rated outlet water temperature less than 120 degree Celsius.
Grade D steam boiler with rated steam pressure less than or equal to 0.1 MPa; The rated outlet temperature is less than 120 MW and rated thermal power is less than or equal to 2.8 MW.
-
WNS series gas-fired (oil-fired) steam boilerLive Chat1-20 t/h0.7-2 MPa
-
SZS series gas-fired (oil-fired) steam boilerLive Chat2-110 t/h1.25-5.3 MPa
-
SZL series coal-fired steam boilerLive Chat6-35 t/h1-2.5 MPa
-
Email us
-
WhatsApp: +86 18861589035
WeChat: +86 13506150756
Live Chat

-
On the edge of the tropical jungles of Sumatra, Indonesia, the hum of machinery blends with the scent of palm fruit, painting a busy picture of the local palm oil processing industry. As a key global production base, Indonesian oil processing enterprises have a high dependency on reliable thermal energy supply. Booming Oil Processing Industry in Indonesia Recently, Wuxi ZOZEN Boiler Co., Ltd. ("ZOZEN Boiler") successfully delivered and commissioned a 15 t/h SZL series coal-fired steam boiler...03 Feb 2026 -
As clean heating upgrades continue to accelerate across northern China, high-efficiency and environmentally compliant heating equipment has become essential to ensuring winter heating security while supporting the country’s carbon reduction goals. In Tianjin, several large district heating companies have independently selected the same core solution — the ZOZEN SZS series gas-fired hot water boiler — delivering stable heat throughout the winter while contributing to improved ai...27 Jan 2026 -
The Regulations on the Administration of Rare Earths, effective from October 1, 2024, are accelerating the rare earth industry’s standardized and intensive transformation under the framework of resource protection, compliant governance, and green development. As demand for rare-earth permanent magnet materials from sectors such as new energy vehicles, wind power, and intelligent manufacturing stabilizes and improves, industry sentiment is rebounding. As the “World Capital of Rare Ear...20 Jan 2026











