Copper – Internal Working Pressure Type M*

Calculated Rated Internal Working Pressure for Copper Tube: Type M*

———— 570485466456 494420403395 ———— 407346332326 337286275270 338287276271 331282270265 299254244239 274233224219 253215207203 252214206202 251213205201 233198190186 218186178175 229195187183 230195188184 230195188184

Nominal or standard size, in inches	Annealed***
	S= 6000 psi 100F	S= 5100 psi 150F	S= 4900 psi 200F	S= 4800 psi 250F
1/4
3/8
1/2
5/8
3/4
1
1-1/4
1-1/2
2
2-1/2
3
3-1/2
4
5
6
8
10
12

——— 447380285 387329247 ——— 319271204 264225169 265225169 259221166 234199149 215183137 199169127 197168126 197167126 182155116 171146109 180153115 180153115 180153115

Nominal or standard size, in inches	Annealed***
	S= 4700 psi 300F	S= 4000 psi 350F	S= 3000 psi 400F
1/4
3/8
1/2
5/8
3/4
1
1-1/4
1-1/2
2
2-1/2
3
3-1/2
4
5
6
8
10
12

tr>———— 982982982982 850850850850 ———— 701701701701 580580580580 582582582582 569569569569 514514514514 471471471471 435435435435 433433433433 431431431431 400400400400 375375375375 394394394394 394394394394 395395395395

Nominal or standard size, in inches	Drawn**
	S= 10,300 psi 100F	S= 10,300 psi 150F	S= 10,300 psi 200F	S= 10,300 psi 250F
1/4
3/8
1/2
5/8
3/4
1
1-1/4
1-1/2
2
2-1/2
3
3-1/2
4
5
6
8
10
12

——— 953925896 825800776 ——— 680660639 563546529 565548531 553536520 499484469 457444430 423410397 421408395 419406394 388377365 364353342 382371359 383371360 383372360

Nominal or standard size, in inches	Drawn**
	S= 10,000 psi 300F	S= 9,700 psi 350F	S= 9,400 psi 400F
1/4
3/8
1/2
5/8
3/4
1
1-1/4
1-1/2
2
2-1/2
3
3-1/2
4
5
6
8
10
12

* Based on maximum allowable stress in tension (psi) for the indicated temperatures (F).

** When brazing or welding is used to join drawn tube, the corresponding annealed rating must be used.

*** Types M and DWV are not normally available in the annealed temper. Shaded values are provided for guidance when drawn temper tube is brazed or welded. For more information, see Pressure Ratings and Burst Strength.