NAME OF SHOP

UNION STORE

Austenitic Stainless Steel Pipe/Tube

Austenitic stainless steel has austenite as its primary phase at both elevated and room temperature. A stable austenite contains about 18% Cr, 8%-10% Ni and about 0.1% C. Cr-Ni austenitic stainless steel includes the most familiar stainless steel 18Cr-8Ni and the series of high Cr-Ni steel developed by increasing Cr and Ni content and adding elements such as Mo, Cu, Si, Nb, Ti, etc. Austenitic stainless steel is characterized by non-magnetic, high plasticity and ductility but lower strength. It can be only strengthened via cold working (by adding S, Ca, Se, Te and etc., austenitic stainless steel can have excellent machinability).

• Application:Austenite has been widely used in many industrial fields due to its good corrosion resistance and excellent processing performance.

• Specification:ASTM A213, ASTM A249, ASTM A269, ASTM A312, ASTM A358, ASTM A688, ASTM A789, ASTM A790

• Grades: 304/L/H/LN, 316/L/H/LN/Ti, 310S/H, 317/L, 347/H /HFG, XX/H

Super Austenitic Stainless Steel Pipe/Tube

Super austenitic stainless steel is defined as Cr-Ni stainless steel with a Pitting Resistance Equivalent Number (PREN=[Cr]+3.3[Mo]+16[N])≥40%. Super austenitic stainless steel is mainly developed to solve the deficiency of pitting corrosion resistance, crack corrosion resistance and poor thermal stability of the original high molybdenum (>4%) Cr-Ni austenitic stainless steel under the harsh corrosion conditions containing Cl-.

• Application:

• Petrochemical engineering: Petrochemical industries such as oil refineries and chemical plants

• Marine environment: Offshore platform instrument tube, pipeline tube, and seawater condenser tube, etc.

• Specification:ASTM A213, ASTM A249, ASTM A269, ASTM A312, ASTM A358, ASTM A688, ASTM A789, ASTM A790

• Grades:UNS N08904(904L), UNS N08367(6Mo), S31254(6Mo)

(Super) Duplex Stainless Steel Pipe/Tube

Duplex stainless steel (DSS) is featured with structure of two phases (α and γ) and has characteristics of both ferritic and austenitic stainless steel. It has best corrosion resistance and high strength. In general, when the content of C is low, the content of Cr and Ni ranges from 18% to 28% and 3% to 10% respectively. Some steels also contain the alloy elements such as Mo, Cu, Nb, Ti and N, etc.

• Application:

• Petrochemical industry: Oil and gas industry pipelines, piping, heat exchanger tubes; industrial pipelines such as phosphoric acid and sulfuric acid.

• Marine environment: Offshore platform pipeline tubes, seawater condenser pipes, underwater umbilical cables, fire fighting system pipes, desalination equipment pipes, etc.

• Specification:ASTM A789, ASTM A790, ASTM A928

• Grades:S31500, S31803/S32250, S32003, S32304, S32101, S32201, S32750, S32760

Corrosion & High Temperature Resistant Alloys Pipe

• Application:

• Petrochemical industry: Heat exchangers, condensers, synthetic fiber heating tubes and furnace tubes for oil extraction, petroleum refining and chemical industry.

• Nuclear power chemical industry: Nuclear power plant heat exchangers, steam generator tubes, high temperature hydrogen fluoride furnace tubes and containers, waste sintering furnaces, etc.

• Thermal power:Superheater tubes and reheater tubes for boilers of ultra-supercritical units.

• Specification:ASTM B163, ASTM B165, ASTM B167, ASTM B423(UNS N08825 & UNS N08221), ASTM B705(UNS N06625, N06219 & N08825)

• Grades:UNS N04400, UNS N06600, UNS N06601, UNS N06617, UNS N06625, UNS N06690, UNS N07718

  UNS N08800, UNS N08810, UNS N08811, UNS N08020, UNS N08535, UNS N08825, UNS N08925, UNS N10276, S30432, S31042, S31035

Bimetal Composite Pipe

Composite materials have become the development trend of various industries in the world due to their comprehensive compatibility of different material and outstanding performance and economic performance. Because of the perfect combination of corrosion-resistant alloy layer function and pressure resistance function of carbon steel base, as well as the cost advantage compared with stainless steel and nickel alloy pure metal pipes, bimetal composite pipe has been widely used in the oil and gas transmission pipeline of high-temperature, high-pressure and high-corrosion environment (hydrogen sulfide, chloride ion).

In order to meet the requirements of different working conditions, our composite pipes are produced by two processes, that is mechanical composite and metallurgical composite, providing a comprehensive and systematic overall pipeline solution for oil and gas gathering and transportation.

• Application:Oil and gas field transmission pipeline

• Standards:Specification for Corrosion-resistant Alloy Composite Steel Pipe or Liner ，Submarine Pipeline System

• Grades:X52—X80, TP316L, S31803/S32205, S32750, UNS N08825, UNS N06625, UNS N010276

(Ultra Pure) Ferritic Stainless Steel Pipe/Tube

Ferritic stainless steel is an interstitial solid solution of carbon dissolved in α-Fe with a body-centered cubic structure. It is one of the three kinds of stainless steels that came into being at the beginning of the 20th century, together with martensite and austenitic stainless steels. The traditional ferrite stainless steels contain almost no nickel, with relatively low cost and price, and excellent comprehensive performance, which make them favored by the market.

• Application:Chemical equipment heat exchangers, nuclear power steam-water separator tubes, etc.

• Specification: ASTM A268

• Grades: 409L, 439, 444

Titanium Alloys Tube

Different from chemically pure titanium, industrial pure titanium contains oxygen, nitrogen, carbon, and other elements, improving its corresponding strength.

Grade 1, Grade 2, and Grade 3 refer to industrial pure titanium. The difference among these three grades is that the larger the number, the more impurities in the lattice gaps, and thus the higher the strength and hardness. Grade 7 is a titanium-palladium alloy; Grade 16 is a higher-purity titanium-palladium alloy; and Grade 12 is a titanium-molybdenum-nickel alloy. Titanium alloys have good mechanical and punching properties and can be welded using various welding procedures. The strength of the welded joint can reach 90% of the base metal strength, and titanium alloys also exhibit good cutting performance. Titanium exhibits high corrosion resistance to chlorides, sulfides, and ammonia, and offers better corrosion resistance than aluminum, stainless steel, and nickel alloys in seawater service.

• Application:

• Petrochemical industry: All kinds of chemical process pipelines (e.g., PTA, polyolefin, phenol, etc.) and heat exchanger tubes.

• Marine environment: Seawater desalination steam condenser pipes, marine pipes, etc.

• Grades: Grade 1, Grade 2, Grade 3, Grade 7, Grade 12, Grade 16