ASME SA178 Kub Exchanger Tube

SA178 tshav kub exchanger raj yog hluav taws xob tsis kam welded carbon steel hlab uas ua raws li American cov qauv. Lawv tau dav siv nyob rau hauv tshav kub exchangers, boilers, thiab superheaters. Txhua lub raj SA178 kub exchanger tube raug kuaj cov khoom siv tshuaj, kuaj cov cuab yeej ntawm lub cev, kuaj tsis muaj kev puas tsuaj, thiab kev kuaj thib peb (raws li tus neeg thov), kom ntseeg tau tias cov kav dej welded zoo. GNEE Group tau tshwj xeeb hauv kev muab SA178 cua kub exchanger raj rau 16 xyoo. Thov hu rau peb yog tias koj muaj kev xav tau.

A178 Kub Exchange Tube Specification

TxujTxuj: ASTM A178, ASME SA178

Qib: GR.A, GR.C, GR.D

Sab nraud: 6-114mm

Phab ntsa Thickness: 1-15mm

NtevNtev: Max 12000mm

A / SA 178 Thaum tshav kub kub Exchanger / Condenser Tubes Chemical Composition

Element	A/SA 178 Gr. A	A/SA 178 Gr. C	A/SA 178 Gr. D
C	0.06 - 0.18	0.35 max	0.27 max
Mn	0.27 - 0.63	0.80 max	1.00 - 1.50
P	0.035 max	0.035 max	0.030 max
S	0.035 max	0.035 max	0.015 max
Si	-	-	0.10 min

A/SA 178 Carbon Steel Heat Exchanger & Condenser Tubing Mechanical Properties

Element	A/SA 178 Qib A	A/SA 178 Qib C	A/SA 178 Qib D
Tensile zog KSI (MPa)	47 (325)	60 (415)	70 (485)
Yield zog KSI (MPa)	26 (180)	37 (255)	40 (275)
Elongation min. %	35	30	30

A178 Carbon Steel Condenser Tubes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Eddy Current Testing (ECT) rau A178 ERW cua sov exchanger raj:

Eddy tam sim no kuaj (ECT) yog ib txoj kev tsis sib cuag siv los tshuaj xyuas cov khoom tsis yog ferromagnetic. Cov txheej txheem no tsim nyog rau kev kuaj xyuas thiab ntsuas qhov tsis sib xws xws li corrosion, yaig, hnav, pitting, baffle txiav notches, phab ntsa thickness poob, thiab tawg nyob rau hauv cov ntaub ntawv uas tsis yog-ferrous hlau.

Ob lub coils zoo siab nrog cov hluav taws xob tam sim no los tsim ib qho chaw sib nqus nyob ib puag ncig lawv. Qhov no magnetic teb nkag mus rau cov khoom ntawm lub raj, inducing alternating currents (eddy currents) nyob rau hauv cov khoom.
Txhua yam tsis xws luag uas hloov cov eddy tam sim no kuj hloov impedance ntawm cov coils.

Cov kev hloov pauv hauv coil impedance yog ntsuas thiab siv los ntsuas qhov tsis xws hauv lub raj.

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