800H Steel Flange DN15 - DN3000 Special Material Flanges

800H Special Material Flanges in Various Industries with Material for Secure Connections​

Crafted from Incoloy 800H (UNS N08810), these advanced flanges are engineered to thrive in extreme high-temperature, corrosive, and oxidizing environments, making them indispensable for petrochemical refineries, power generation, heat treatment furnaces, and nuclear reactors. With a unique nickel-iron-chromium alloy composition (Ni 30-35%, Cr 19-23%), they deliver exceptional resistance to oxidation, carburization, and sulfidation at temperatures up to 1150°C (2102°F), ensuring leak-proof reliability in critical systems exposed to steam, hydrocarbon gases, and molten salts.

Key Benefits

✅ Superior High-Temperature Performance:

• Outstanding Creep Resistance: Maintains structural integrity under prolonged stress at elevated temperatures, ideal for ethylene cracking furnaces, reformers, and radiant tubes.

• Oxidation & Carburization Defense: Chromium content forms a protective oxide layer, resisting scaling and degradation in CO-rich or sulfur-containing atmospheres.

✅ Robust Mechanical Durability:

• High Tensile Strength (≥450 MPa) and thermal fatigue resistance ensure reliability in cyclic heating/cooling applications and high-pressure systems (Class 150 to 2500).

• Excellent resistance to chloride-induced stress corrosion cracking (SCC) in marine and chemical environments.

✅ Cost-Efficient Longevity:

• Slashes downtime and replacement costs with a lifespan 3-5x longer than standard 304H/310S steels in coking, pyrolysis, and hydrogen production units.

• Operates reliably from -200°C to 1150°C (-328°F to 2102°F), suitable for cryogenic LNG systems to high-heat industrial furnaces.

✅ Global Compliance & Traceability:

• Manufactured to ASTM B407, ASME SB-407, EN 1092-1, and PED 2014/68/EU standards, with full material traceability (MTC 3.1) and ISO 9001/API Q1 certifications.

• Compliant with NACE MR0175 for sour service (H₂S environments) and ASME III for nuclear applications.

✅ Customizable Solutions:

• Types: Weld neck, slip-on, blind, lap joint, and threaded designs.

• Sizes: DN15 to DN2000, with tailored pressure ratings (PN10 to PN400), face finishes (RF/RTJ/FF), and bore alignments.

• Post-Treatment: Solution annealing, shot blasting, or pickling for enhanced surface stability.

Quality Inspection

Quality Management Department is establshed in the enterprise, which is responsible for the implementation of quallty management acrossall sectors, including QC, QA and implement and supervise various management system. The company reviews the Quality Manual byconducting management reviews annually to confirm its conformance, effectiveness and suitability.

Project Achievement

HENGLI Petrochemical 40 million / year ton of oil refining integration project	ZHEJIANG Petrochemical 40 million / year ton of oil refining integration project	LIANYUNGANG Petrochemical 3.2 million tons / young hydrocarbon comprehensive	YISHENG New Material The 6.6 million tons / year of the PTA project	CNOOC Huizhou Refining & Chemical Co Huilian Phase II, 22 million / year ton of oil refining Reconstruction and expansion project	Sinopec Zhenhai Refining & Chemical Company 1.2 million / year ton ethylene renovation and expansion project	Wanhua Chemical 480,000 tons / year bisphenol A integration project	GUANGXI Huayi New Materials Integration project of new chemical materials	CNOOC Shell The SMPO & POD project	China AtlantoShaanxi Coal Chemical Industry: 1.8 million tons / year ethylene glycol project
Hainan Huasheng 2.26 million tons / year non-photogamic polycarbonate project	Shenghong Refining The 16 million tons / year oil refining project	Anhui Haoyuan Chemical Industry 300,000 tons / year ethylene glycol project	Heilongjiang Longyou Petrochemical Company5.5 million tons / year heavy oil catalytic pyrolysis project	HuaLu Hengsheng 500,000 tons / year ethylene glycol project	Baofeng Energy600,000 tons / year methanol to olefin project	Jiangnan Shipyard (98000m³ liquefied ethane ship, etc.) Brand number: 316 / 316L, delivery time: 2020.12	Keppel shipyard in Singapore (FLNG ship) Brand number: 316 / 316L, delivery time: 2020.1	Guangzhou Wenchong Shipyard (Super double-phase steel desulfurization tower) Brand number: S32750 Delivery time: 2021.3	CSSC Dalian (FPSO, MV31, etc.) Brand number: 316L, etc., delivery date, 2019.8
725 Institute of China Shipbuilding Industry (Cu-Ni alloy Tube)	Nantong COCSO Shipyard (FSRU ship module)	CIMC Raffles (Drilling Rig)	CNOOC Orient 13-2 (Lined pipe)	CNOOC Bozhong 19-6 (Lined Pipe)	Petrobras MODEC FPSO (COSCO Shipping)	CNOOC Guangxi LNG, storage and transportation storage Brand number: 304 / 304L Specification: (8 "~32")×(3.76~9.53mm)	CNOOC Zhejiang LNG Phase II Brand number: 304 / 304L Specification: (6 "~28")×(7.11~10.31mm)	Sinopec Shandong LNG Phase II Brand number: 304 / 304L Specification: DN250 SCH10S	LIANYUNGANG Petrochemical A 4X160000m³ low-temperature ethane storage tank Brand number: 304 / 304L Specification: 813X12.7MM Delivery time: 2020.9
Sinopec Luoyang Institute Wenzhou LNG terminal Brand number: 304 / 304L Specification: 219.1~711X12.7MM Delivery time: 2022.3	Huatai Shengfu 160,000 m ³ low-temperature ethane storage tank Brand number: 304 / 304L Specification: 219~508X9.53MM	YAMAL LNG Brand number: 304 / 304L Specification: 406~914X9.53MM	Beijing Maiden Voyage	Oriental Hope	Sichuan Yongxiang 70,000 tons / year high purity polysilicon project	Xinjiang Daquan 25,000 tons / year high purity polysilicon project	Eagle Central China Paper Industry 500,000 tons of box board project	Guangxi Sun Paper 3.5 million tons of forest pulp and paper integration project	APP for Asian pulp and paper Chemical machine pulp and sewage treatment project
TCL Shenzhen Huaxing Optoelectronics semiconductor clean pipeline project	Beijing Daxing Airport	Hong Kong-Zhuhai-Macau/Macao Bridge Tubes used for stainless steel construction	CNNC Xiapu nuclear Power Plant Fast reactor demonstration project of CNNC 2.3	CONBA Stainless steel pipe for pharmaceutical engineering	Shenghong Refining Stainless steel associated heat pipe	Hangzhou Sewage Treatment Plant Stainless steel pipe for backwash purification unit	Qilu Pharmaceutical Fluid stainless steel pipe for raw material delivery	Zijin Mining Wet copper smelting, stainless steel sewage pipe	ect
									……

Certificate

API-5LD AUTHENTICATION	American Petroleum Institute API 5LC Certificate	ASME Certificate in the United States	EU PED&AD2000 certificate	ABS classification society certification certificate in the United States	DNV Det Norske Veritas Certificate	RINA Italian Bureau of Shipping Certificate	BV French Bureau of Shipping certification	LR Lloyd's Register Certificate of Approval	Customs Union EAC Certificate	Russian GOST certificate

Raw Material Vendors	Cooperation Partners

Everest Technology (Wuxi) Co., Ltd. is a one-stop industrial innovation solution provider, specializing in premium raw materials, precision manufacturing, and green technology. We empower global clients with end-to-end services from design to delivery, rooted in material expertise, smart manufacturing, and sustainable innovation.