ASTM A795/A795M -13 Cov kav dej tua hluav taws

ASTM A795 / A795M (2)

Standard Specification rau Dub thiab Kub-dipped Zinc-Coated (Galvanized) Welded thiab Seamless Steel Yeeb Nkab rau kev tiv thaiv hluav taws

ASTM A795 Fire Fighting Pipes Groove Ends

ASTM A795 (Cov yeeb nkab liab lossis xim liab / dub pleev xim los yog GALVANIZED lossis FEB coated)

sib xws, kev cia siab, thiab kev ua tau zoo dua.

Dimensions, Nyhav, thiab Test Siab Rau Lub Teeb-hnyav Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob-Tshooj 10^A
NPS Designator	DN tus tsim	Sab nraud txoj kab uas hla		Nominal Phab Ntsa Thickness		Nyhav Plain End		Kuaj Siab
		Sab nraud txoj kab uas hla		Nominal Phab Ntsa Thickness		Nyhav Plain End		Rauv-welded		Seamless thiab Electric-Resistance- Welded
		hauv.	mm	hauv.	mm	lb/ft	kg/m	psi	kPa ua	psi	kPa ua
3/4	20	1.050	[26.7]	0.083	[2.11]	0.86	[1.28]	500	[3400]	700	[4800]
1	25	1.315	[33.4]	0.109	[2.77]	1.41	[2.09]	500	[3400]	700	[4800]
1 1/4	32	1.660	[42.2]	0.109	[2.77]	1.81	[2.69]	500	[3400]	1000	[6900]
1 1/2	40	1.900	[48.3]	0.109	[2.77]	2.09	[3.11]	500	[3400]	1000	[6900]
2	50	2.375	[60.3]	0.109	[2.77]	2.64	[3.93]	500	[3400]	1000	[6900]
2 1/2	65	2.875	[73.0]	0.120	[3.05]	3.53	[5.26]	500	[3400]	1000	[6900]
3	80	3.500	[88.9]	0.120	[3.05]	4.34	[6.46]	500	[3400]	1000	[6900]
3 1/2	90	4.000	[101.6]	0.120	[3.05]	4.98	[7.41]	500	[3400]	1200	[8300]
4	100	4.500	[114.3]	0.120	[3.05]	5.62	[8.37]	500	[3400]	1200	[8300]
5	125	5.563	[141.3]	0.134	[3.40]	7.78	[11.58]	B	B	1200	[8300]
6	150	6.625	[168.3]	0.134	[3.40]	9.30	[13.85]	B	B	1000	[6900]
8	200	8.625	[219.1]	0.188^C	[4.78]	16.96	[25.26]	B	B	800	[5500]
10	250	10.750	[273.1]	0.188^C	[4.78]	21.23	[31.62]	B	B	700	[4800]
Ib Lub Sijhawm 10 sib raug rau Teem sijhawm 10S raws li teev hauv ANSI B36.19 rau NPS 3/4 txog 6 [DN 20 txog 150] nkaus xwb. B Rauv-welded yeeb nkab tsis yog ua nyob rau hauv qhov ntau thiab tsawg dua NPS 4 [DN 100]. C Tsis Teem Caij 10.

Dimensions, Nyhav, Test Pressures Rau Standard-Weight Fire Protection Pipe-Tshooj 30 thiab Teem sijhawm 40
NPS Tus tsim	DN Tus tsim	Sab nraud txoj kab uas hla		Nominal Phab Ntsa Thickness A		Nyhav Plain End		Nyhav Threaded thiab Coupled B		Kuaj Siab
		Sab nraud txoj kab uas hla		Nominal Phab Ntsa Thickness A		Nyhav Plain End		Nyhav Threaded thiab Coupled B		Rauv-welded		Seamless thiab Hluav taws xob-Resistance- Welded
		hauv.	mm	hauv.	mm	lb/ft	kg/m	lb/ft	kg/m	psi	kPa ua	psi	kPa ua
1/2	15	0.840	[21.3]	0.109	[2.77]	0.85	[1.27]	0.85	[1.27]	700	[4800]	700	[4800]
3/4	20	1.050	[26.7]	0.113	[2.87]	1.13	[1.69]	1.13	[1.68]	700	[4800]	700	[4800]
1	25	1.315	[33.4]	0.133	[3.38]	1.68	[2.50]	1.68	[2.50]	700	[4800]	700	[4800]
1 1/4	32	1.660	[42.2]	0.140	[3.56]	2.27	[3.39]	2.28	[3.40]	1000	[6900]	1000	[6900]
1 1/2	40	1.900	[48.3]	0.145	[3.68]	2.72	[4.05]	2.73	[4.07]	1000	[6900]	1000	[6900]
2	50	2.375	[60.3]	0.154	[3.91]	3.66	[5.45]	3.69	[5.50]	1000	[6900]	1000	[6900]
2 1/2	65	2.875	[73.0]	0.203	[5.16]	5.80	[8.64]	5.83	[8.68]	1000	[6900]	1000	[6900]
3	80	3.500	[88.9]	0.216	[5.49]	7.58	[11.29]	7.62	[11.35]	1000	[6900]	1000	[6900]
3 1/2	90	4.000	[101.6]	0.226	[5.74]	9.12	[13.58]	9.21	[13.71]	1200	[8300]	1200	[8300]
4	100	4.500	[114.3]	0.237	[6.02]	10.80	[16.09]	10.91	[16.25]	1200	[8300]	1200	[8300]
5	125	5.563	[141.3]	0.258	[6.55]	14.63	[21.79]	14.82	[22.07]	C	C	1200	[8300]
6	150	6.625	[168.3]	0.280	[7.11]	18.99	[28.29]	19.20	[28.60]	C	C	1200	[8300]
8	200	8.625	[219.1]	0.277^A	[7.04]	24.72	[36.82]	25.57	[38.09]	C	C	1200	[8300]
10	250	10.750	[273.1]	0.307^A	[7.80]	34.27	[51.05]	35.78	[53.29]	C	C	1000	[6900]
A NPS 1/2 txog 6 [DN 15 txog 150]-Schedule 40; NPS 8 thiab 10 [DN 200 thiab 250] - Teem sijhawm 30. B Raws li 20-ft [6.1-m] ntev. c Rauv-welded yeeb nkab tsis yog tsim nyob rau hauv qhov ntau thiab tsawg dua NPS 4 [DN 100].

1. KEV NTSEEG

1.1 Thickness:Qhov tsawg kawg nkaus phab ntsa thickness ntawm txhua qhov chaw yuav tsum tsis pub ntau tshaj 12.5% raws li cov phab ntsa thickness.

1.2 ntawm txoj kab uas hla:

Rau NPS 11/2" thiab nyob rau hauv ib qho chaw yuav tsum tsis txhob sib txawv ntau tshaj +0.4 hli -0.8 hli.

Rau NPS 2" thiab saum toj no yuav tsum tsis txhob sib txawv ntau tshaj +/- 1% ntawm tus qauv teev

1.3. Ntawm Qhov hnyav

Qhov hnyav ntawm cov yeeb nkab yuav tsum tsis pub ntau tshaj ± 5% ntawm qhov hnyav.

2.ENDS

Txhua qhov kawg ntawm cov yeeb nkab yuav tsum tau muab tso rau hauv qhov kawg tshwj tsis yog tias tau teev tseg.

3.INTERNAL DEBEADING

2 "thiab saum toj no -Internal hlaws dai kom tshem tawm tag nrho.

ASTM A795 Galvanized Fire Fighting Pipes

4.CHEMICAL COMPOSITION

GRA%MAX-C-0.25%,Mn-0.95%6,S-0.035%,P-0.035%

5.Mechanical (MIN.)

GR.A Yield zog -205 N/mm², Tensile zog -330 N/mm², Elongation -25-30%

6.FLATTENING TEST

Weld nyob 0 thiab 90 degree los ntawm kab ntawm kev coj ntawm lub zog.

Theem -1: Rau weld ductility mus txog 2/3 ntawm sab nraud txoj kab uas hla ntawm cov qauv raj.

Theem -2: Rau ductility ntawm steel mus txog 1/3 ntawm sab nraud txoj kab uas hla ntawm cov qauv raj.

Theem -3: Tag nrho flattening rau kev sim cov khoom laminated thiab tsis zoo.

7.Leak TightNESS TEST

7.1 Ntawm kab NDT (Eddy Tam sim no)

7.2Hydro kuaj ntawm lub siab raws li cov lus saum toj no thiab tuav lub sijhawm Min. 5 Thib ob.

8. DUB VARNISH

Tubes yog uniformly varnished externally tshaj lawv tag nrho ntev.

9.COATING

9.1 ZINC txheej

Qhov nruab nrab 460 gm / m²tab sis ib sab yuav tsum tsis txhob tsawg dua 400 gm / m²los yog Qhia los ntawm cov neeg siv khoom

Dawb los ntawm liab qab Spot, Dub chaw, ntxhib, tshaj txheej, Peel tawm los yog lwm yam defect.

ASTM A795 qhia cov khoom siv nruj nruj kom ntseeg tau tias cov yeeb nkab ua tau raws li qhov tsim nyog lub zog thiab kev tiv thaiv corrosion.

Kub dip galvanizing ntxiv txhim khu lub kav ntev ntawm cov yeeb nkab, tso cai rau nws tiv taus cov teeb meem nyuaj uas feem ntau ntsib hauv kev lag luam thiab hluav taws kub sib ntaus ib puag ncig.

9.2 FBE txheej

FBE txheej yeeb nkab yog Fusion Bonded Epoxy txheej steel yeeb nkab. Nws tuaj yeem siv rau sab nrauv lossis sab hauv txheej, nrog cov khoom siv hluav taws xob rau cov yeeb nkab.

Nrog coated ib daim ntawv ntawm cov hmoov qhuav ntawm thickness 400-600 microns rau ntawm cov yeeb nkab rhuab. Thaum FBE coated rau ntawm cov yeeb nkab nto, FBE zaj duab xis muab ib qho nyuaj heev nto nrog zoo adhesion rau cov yeeb nkab nto. FBE txheej nyob rau hauv ib tug txawm daim ntawv thiab muaj zoo tiv thaiv cov tshuaj tiv thaiv.

ASTM A795 Fire Fighting Pipes External Epoxy coated