Stainless Steel BA/EP Tube

• Overview

  Stainless steel BA/EP tubes are mainly used in high-purity gas production, pharmaceuticals, semiconductors, biology and other industries with high cleanliness requirements. For environments with ultra-high cleanliness requirements, the tubes need to be nitrogen purged and packaged in a clean room to meet the requirements. The inner surface of the pipe can be bright annealed (BA) or electropolished (EP).

  
  

  Due to semiconductors, integrated circuits, Biological pharmacy, food and beverage, laboratory, fine chemical industry and automobile industry having strict requirements on the work environment of ultra clean, high reliability and resistance to corrosion and so on, so the pure medium (gas and liquid) pipeline generally emphasize surface roughness and cleanliness, to suppress the particle generation and accumulation retention.

  
  

  In order to ensure weldability and welding quality, it is required to ensure that the pipe has high precision dimensional tolerance and stable chemical composition, so as to reduce the occurrence of flue gas and particles during welding, and improve the corrosion resistance and smoothness of welding parts. In a word, high purity pipelines should have both beautiful appearance (external purity) and excellent quality (internal purity).

  
  

  External purity

  It refers to not only bright external surface, but also a good inner surface roughness, which is to ensure that the pipeline system to transmission medium neutral, as well as excellent purge and cleaning performance. In order to ensure the quality and efficiency of automatic rail welding, the pipe is required to have high dimensional tolerance accuracy.

  
  

  Inner purity

  It refers to pure material. The HP/UHP bright tube in the real sense has very strict requirements on the chemical composition, inner purity and performance of the material in addition to the beautiful inside and outside surface.

• Specification

  ASTM A213

  ASTM A269

  ASTM A270

  ASME A270-BPE

  ASTM A312

  ASTM A632

  ASME BPE

  JIS G3459

  ISO 1127

  ISO/TS 16949

  EN10216-5

  EN10305-1

  
  

  Features

  Inner suface Ra0.4um

  External surface Ra0.1um

  OD tolerance ±0.02mm

  WT tolerance ±0.02mm

  L tolerance ±0.10mm

  Straightness ≤0.5mm/m

  Concentricity±0.05mm

  High purity water cleaning

  Nitrogen purging

  Dust-free clean packing

  Packed in single plastic bag

  
  

  QA/QC

  Chemical composition

  Roughness

  Cleanliness

  Hardness

  Microstructure

  Intergranular corrosion test

  Salt spray test

  Mechanical properties

  ET/UT/Hydrostatic

  Air tightness test

  Dimension/Size/Surface

• Type

  BA tube

  EP tube

  MP tube

  Fluid polished tube

  Honing polished tube

  
  

  Size

  OD 1.0 ~ 76 mm

  WT 0.10 ~ 10.0 mm

  L 6000 ~ 18000 mm

  Coil ≤ 500 mm

  
  

  Material

  304 / 304L

  316 / 316L / 316Ti

  904L / N08904

  UNS N10276

  UNS N04400

  UNS N06600 / N06625

  UNS N08800 / N08825

  Nickel 200 / 201

  
  

• Application

  Used in semiconductor, liquid crystal industry, solar photovoltaic, biopharmaceutical, medical devices, precision instrumentation, integrated circuits, electronic chips, dust-free clean workshop, ultra-high purity gas, chemical system, WFI system, ultra-precision processing and other cutting-edge industries which reqest high-purity or ultra-high purity gas / fluid pipeline system.

  (1) UHP gas system

  (2) UHP liquid system

  (3) DI UHP water system

  (4) Hydrogen pipeline for hydrogen energy

  (5) High level laboratory gasline

  (6) Catheters

  (7) Pipeline for beverage

  (8) Food processing: aseptic tube sheet/tubular heat exchanger

  (9) EGR pipeline of automobile: Gas transmission system, fuel injection system, high pressure oil rail pipeline

  (10) Biological pharmacy: Such as pure water processor, tubular evaporator, steam generator and bioreactor, etc.

  (11) Semiconductor/microelectronics：as transmission pipeline of HP/UHP special gas in a clean room and gas source holder for LED, LCD, OLED, solar panel, etc.

• Process

  

• ASME BPE PIPING

  ASME BPE Piping shall comply with ASME SA249，ASTM A269/A270-S2，for equipment and applications that serve biopharmaceutical processes。

  Material: TP316L (S 0.005 ~ 0.017%).

  Main type: SF0, SF1, SF4

  
  

  OD Inch	1/4		1/2			3/4		1
  ID Inch	0.035	0.049	0.035	0.049	0.065	0.049	0.065	0.049	0.065

  
  

  Condition	Surface condition
  BA	ID	<32Ra	<0.8μm
  	OD	<32Ra	<0.8μm
  BA+	ID	<20Ra	<0.5μm
  	OD	<32Ra	<0.8μm
  EP	ID	<10Ra	<0.25μm
  	OD	<32Ra	<0.8μm

  
  

  
  

• HP BA CR welded tube

  HP BA CR Welded tube，the process is welding + oil drawn + deoiling and pickling + ultrasonic cleaning + dust free clean packing. The cold drawing process is to squeeze the weld through the inner mold and the outer mold to overcome the weaknesses of the weld in the terminal application, such as cleanliness requirements, leakage risk, not easy to bend and so on. The tube can be widely used in clean environment such as biopharmaceutical, automobile manufacturing, fine chemical, food and beverage, etc.

  Through strict process, we can get high level well-cleaned sanitary tubes with inner surface.

  
  

  OD Inch	1/4			5/16			3/8			1/2
  WT Inch	0.028	0.035	0.049	0.028	0.035	0.049	0.035	0.049	0.065	0.035	0.049	0.065	0.083

  
  

  OD Inch	5/8					3/4					1
  WT Inch	0.035	0.049	0.065	0.083	0.095	0.035	0.049	0.065	0.083	0.095	0.035	0.049	0.065	0.083	0.095	1.200

• UHP BA+ tube for semiconductor

  HP/UHP BA+ tube, material TP316L, main sizes OD6.35 × WT0.89mm, OD9.53 × WT0.89mm, OD12.7 × WT1.24mm. Standard specifications are ASTM A213/A269/A270. By precision oil drawn and ultra sonic pure water cleaning, the inner suface roughness can reach Ra<0.375μm. And dust free clean packing can be done.

  
  

  As pipeline system of high purity gas or special gas for clean room and gas source holder, HP/UHP ultra clean bright tubes are mainly used in semiconductor and micro electronic industries such as LED, LCD, OLED, solar panel, etc. With additional polishing process, the inner suface roughness can reach higher level like Ra0.10um.

  
  

  OD Inch	1/4		3/8		1/2		3/4		1
  WT Inch	0.035	0.049	0.035	0.049	0.035	0.049	0.049	0.065	0.049	0.065	0.083

  
  

• UHP BA+ tubes for biopharmaceutical

  UHP BA+ tube, TP304L, TP316L, standard specification ASTM A213/A269/A270, main sizes OD6.0 x WT1.0mm, OD8.0 x 1.0mm, OD10.0 x 1.0mm, etc. Inner surface finish Ra<0.6μm, single piece with dust free packing.

  
  

  The tube is widely used in biological pharmaceutical equipment, such as pure water treatment equipment, tubular evaporator, steam generator and biological reactor, etc.

  
  

  OD mm	6.0	8.0	10.0		12.0			14.0			15.0			18.0			20.0
  WT mm	1.0	1.0	1.0	1.5	1.0	1.5	2.0	1.0	1.5	2.0	1.0	1.5	2.0	1.0	1.5	2.0	1.5	2.0	2.5

• UHP BA+ tube for laboratory gas

  Main sizes are OD6.35 x WT1.0mm, OD9.53 x 1.0mm, etc.

  With precision oil drawing process, its inner surface roughness can be Ra<0.375um. In addition, after the concentrated nitric acid passivation treatment, can ensure the corrosion protection requirements of corrosive gas transmission.

  
  

  OD Inch	1/4		3/8		1/2		3/4		1			1-1/2
  WT Inch	0.035	0.049	0.035	0.049	0.035	0.049	0.049	0.065	0.049	0.065	0.083	0.049	0.065	0.083

  
  

  
  

• UHP BA+ tube for food and beverage

  Material TP304, TP316L, standard specification ASTM A213/A269/A270, main sizes OD6.0 x 1.0mm, OD8.0 x 1.0mm, OD10.0 x 1.0mm,  inner suface roughness Ra<0.6μm, single piece dust free packing.

  
  

  Widely used in food and beverage industry equipment, such as aseptic tube-plate heat exchanger. OD ≤± 0.05mm，WT ≤±5%，the high precision size guarantees the expansion and welding process of the tube of shell and tube heat exchange equipment, and the high clean inner wall of the tube improves the heat exchange stability and efficiency.

  
  

  OD mm	6.0	8.0	10.0		12.0
  WT mm	1.0	1.0	1.0	1.5	1.0	1.5	2.0

  
  

• UHP BA+ tubes for automotive industry

  UHP BA+ tubes for automotive industry usually request thick wall for  good resistance to high pressure, material TP304L, TP316L, standard specification ASTM A213/A269/A554.

  The tubes for this application has strict requirements on the strength of tube, which is applied to the fuel injection system, high-pressure oil rail pipeline, and EGR pipeline gas transmission system. The working pressure can reach 300Mpa to improve the fuel efficiency of the engine.

  
  

  OD Inch	1/8	1/4	3/8	1/2	5/8	3/4
  WT Inch	0.02 ~0.12	0.02 ~0.12	0.02 ~0.12	0.02 ~0.12	0.02 ~0.12	0.02 ~0.12

  
  

  
  

• UHP BA+ tube for hydrogen pipeline of hydrogen energy

  Tube for this application usually request EP tube and BA tube of austenitic stainless steel.

  1. Hydrogenation tube adopts high nickel equivalent and has better hydrogen brittleness resistance than conventional materials.

  2. Hydrogenation tube has the advantages of high strength, high compression resistance, good plasticity and toughness, reducing the occurrence of hydrogen embrittlement and reducing the risk of leakage.

  
  

  OD Inch	1/4		3/8		1/2		3/4		1			1-1/2
  WT Inch	0.035	0.049	0.035	0.049	0.035	0.049	0.049	0.065	0.049	0.065	0.083	0.049	0.065	0.083