What is the size of inch pipes in mm? How many pipe diameters are 3 8 inches?

Typically, the designation of pipe diameters uses values in inches, so we invite you to familiarize yourself with the table where the values in inches are converted to millimeters. In the scientific literature, the concept of “conditional passage” is used.

Under "conditional passage" understand a value (conventional diameter) that conventionally characterizes the internal diameter and does not necessarily coincide with the actual internal diameter. Conditional passage is taken from the standard range

1inch = 25.4 mm

Please note that if we take a 1" (one inch) pipe, then the outer diameter is not equal to 25.4 mm. This is where the confusion begins -"pipe inches". Let's try to clarify this issue. If you look at the parameters of a cylindrical pipe thread, you will notice that the outer diameter (at one inch) is 33.249 mm, not 25.4.

The nominal diameter of the thread is conventionally related to the internal diameter of the pipe, and the thread is cut on the outer diameter. So we get a diameter of 25.4 mm + two pipe wall thicknesses ≈ 33.249 mm. Thus appeared"pipe inch".

Diameters in inches	Accepted nominal pipe diameters, mm	External dimensions of steel pipe according to GOST 3262-75, mm
½ "	15	21,3
¾ "	20	26,8
1 "	25	33,5
1 ¼ "	32	42,3
1 ½ "	40	48
2 "	50	60
2 ½"	65	75,5
3 ""	80	88,5
4 "	100	114

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MAIN PARAMETERS OF INCH THREADS
(BSW (Ww), BSF, UNC, UNF standards)

Peaks and valleys of the profile inch thread, similar to metric, flat cut. The pitch of an inch thread is determined by the number of threads (turns) per inch 1", but its apex angle is 55° (Whitworth thread - British standard BSW (Ww) and BSF), apex angle is 60° (American standard UNC and UNF ).

The outer diameter of the thread is measured in inches 1" = 25.4 mm- stroke (") symbol inches. Inch thread is characterized by the number of threads per inch. According to American standards, inch threads are made with coarse (UNC) and fine (UNF) pitch.
NPSM- American standard for inch cylindrical pipe threads.
NPT- American standard for inch conical threads.

Standards:

ASME/ANSI B1.1– 2003 Unified Inch Screw Threads, UN & UNR Thread Form
ASME/ANSI B1.10M– 2004 Unified Miniature Screw Threads
ASME/ANSI B1.15– 1995 Unified Inch Screw Threads, UNJ Thread Form

AMERICAN INCH THREAD

Basic parameters of inch thread:

d(D)– outer diameter of the thread of the bolt and nut, respectively;
d p (D p)– average thread diameter of the bolt and nut, respectively;
d i (D i)– internal diameter of the thread of the bolt and nut, respectively;
n– number of threads per inch.

American thread with coarse pitch - UNS

Thread sizes, inches (mm)	D	Dp	*D i*	Thread sizes, inches (mm)	D	Dp	*D i*
Thread sizes, inches (mm)				Thread sizes, inches (mm)
№1 (1,8542)
№2 (2,1844)				1 (25,4)
№3 (2,5146)				1 1/8 (28,58)
№4 (2,8448)				1 1/4 (31,75)
№5 (3,1750)				1 3/8 (34,925)
№6 (3,5052)				1 1/2 (38,10)
№8 (4,1656)				1 3/4 (44,45)
№10 (4,8260)
№12 (5,4864)				2 (50,8)
				2 1/4 (57,15)
1/4 (6,3500)				2 1/2 (63,5)
5/16 (7,9375)				2 3/4 (69,85)
3/8 (9,5250)
7/16 (11,1125)				3 (76,2)
1/2 (12,700)				3 1/4 (82,55)
9/16 (14,2875)				3 1/2 (88,9)
5/8 (15,8750)				3 3/4 (95,25)
3/4 (19,0500)				4 (101,6)
7/8 (22,2250)

American fine pitch thread - UNF

Thread sizes, inches (mm)	D	Dp	*D i*	Thread sizes, inches (mm)	D	Dp	*D i*
Thread sizes, inches (mm)				Thread sizes, inches (mm)
№0 (1,524)				3/8 (9,525)
№1 (1,8542)				7/16 (11,1125)
№2 (2,1844)				1/2 (12,700)
№3 (2,5146)				9/16 (14,2875)
№4 (2,8448)				5/8 (15,875)
№5 (3,1750)				3/4 (19,050)
№6 (3,5052)				7/8 (22,225)
№8 (4,1656)
№10 (4,8260)				1 (25,4)
№12 (5,4864)				1 1/8 (28,58)
				1 1/4 (31,75)
1/4 (6,350)				1 3/8 (34,925)
5/16 (7,9375)				1 1/2 (38,10)

American thread with extra fine pitch – UNEF

Thread sizes, inches (mm)	D	Dp	*D i*	Thread sizes, inches (mm)	D	Dp	*D i*
Thread sizes, inches (mm)				Thread sizes, inches (mm)
№12 (5,4864)
				1 (25,4)
1/4 (6,350)				1 1/16 (26,987)
5/16 (7,9375)				1 1/8 (28,58)
3/8 (9,525)				1 3/16 (30,162)
7/16 (11,1125)				1 1/4 (31,75)
1/2 (12,700)				1 5/16 (33,337)
9/16 (14,2875)				1 3/8 (34,925)
5/8 (15,875)				1 7/16 (36,512)
11/16 (17,462)				1 1/2 (38,10)
3/4 (19,050)				1 9/16 (39,687)
13/16 (20,637)				1 5/8 (41,27)
7/8 (22,225)				1 11/16 (42,86)
15/16 (23,812)

Thread sizes are the outer diameter of the thread, expressed in fractional fractions of an inch. One of the main characteristics of an inch screw thread is the number of turns per inch of thread length (n). The number of turns and thread pitch P are related by the relationship:

American standards provide two thread forms:

A thread with a flat recess, which is designated by the letters UN;
- thread with a radius cavity, which is designated by the letters UNR.

The standard defines three classes of thread accuracy. These classes are designated as 1A, 2A, 3A, 1B, 2B, 3B. Accuracy classes 1A, 2A, 3A refer to external threads; accuracy classes 1B, 2B, 3B refer to internal threads. Accuracy class 1A, 1B is the coarsest and is used in cases where quick and easy assembly is required, even with partially dirty and dented threads. Accuracy class 2A, 2B are the most common and are used for threads general purpose. Accuracy class 3A, 3B imposes the most stringent requirements on threads and is used in cases where it is necessary to ensure a minimum clearance in a threaded connection.

Thread designation. First, the nominal size is written down, then the number of threads per inch of thread, thread group symbols and accuracy class symbol. The letters LH at the end of the entry indicate left-hand thread. Nominal size is the outside diameter, defined as a fractional size or thread number, or their decimal equivalent.
For example: 1/4 – 20UNS – 2A or 0.250 – 20UNC – 2A

BRITISH STANDARD INCH THREADS
(BSW (Ww) and BSF)

Designation threads	BSP size in	thread pitch		largest diameter		smallest diameter		A/F mm	length mm	pipes				thread hole diameter (for drill) mm
Designation threads	BSP size in	in (TPI)	mm	mm	in	mm	in	A/F mm	length mm	DN mm	O.D. mm	O.D. in	thickness mm	BSP.PL (Rp)	BSP.F (G)
-1	1 / 16	28	0,907	7,723	0,304	6,561	0,2583		4±0.9					6,60	6,80
-2	1 / 8	28	0,907	9,728	0,383	8,565	0,3372	15	4±0.9	6	10,2	0,40	2	8,60	8,80
-4	1 / 4	19	1,337	13,157	0,518	11,445	0,4506	19	6±1.3	8	13,5	0,53	2,3	11,50	11,80
-6	3 / 8	19	1,337	16,662	0,656	14,950	0,5886	22/23	6.4±1.3	10	17,2	0,68	2,3	15,00	15,25
-8	1 / 2	14	1,814	20,955	0,825	18,633	0,7336	27	8.2±1.8	15	21,3	0,84	2,6	18,75	19,00
-10	5 / 8	14	1,814	22,911	0,902	20,589	0,8106			16			2,6	-	21,00
-12	3 / 4	14	1,814	26,441	1,041	24,120	0,9496	32	9.5±1.8	20	26,9	1,06	2,6	24,25	24,50
-16	1	11	2,309	33,249	1,309	30,292	1,1926	43	10.4±2.3	25	33,7	1,33	3,2	30,40	30,75
-20	1 1 / 4	11	2,309	41,910	1,650	38,953	1,5336	53	12.7±2.3	32	42,4	1,67	3,2	39,00	39,50
-24	1 1 / 2	11	2,309	47,803	1,882	44,846	1,7656	57	12.7±2.3	40	48,3	1,90	3,2	45,00	45,00
-32	2	11	2,309	59,614	2,347	56,657	2,2306	70	15.9±2.3	50	60,3	2,37	3,6	56,75	57,00
-40	2 1 / 2	11	2,309	75,184	2,960	72,227	2,8436		17.5±3.5	65	76,1	3,00	3,6
-48	3	11	2,309	87,884	3,460	84,927	3,3436		20.6±3.5	80	88,9	3,50	4
-64	4	11	2,309	113,030	4,450	110,073	4,3336		25.5±3.5	100	114,3	4,50	4,5
-80	5	11	2,309	138,430	5,450	135,472	5,3335		28.6±3.5	125	139,7	5,50	5
-96	6	11	2,309	163,830	6,450	160,872	6,3335		28.6±3.5	150	165,1	6,50	5

Difference between measurement systems

In terms of external parameters, inch designs do not differ from metric ones, the difference lies in the type of notches. There are 2 types of threads according to the inch system - English and American. The first option corresponds to a notch angle of 55 degrees, and the metric (American) system with an angle of 60 degrees. generally accepted.

At different degrees It is difficult to distinguish between an angle of 55 for inch designs and 60 for metric designs, and the rounding of the threads is immediately visible, making an error impossible. To measure the thread pitch, a thread gauge is used, but instead of it, a regular ruler or other device can be used well.

Replacing steel pipes with polymer ones

In gas and water supply network apply steel products, the diameter of which is indicated in inches (1", 2") or fractions (1/2", 3/4"). When measuring the cross-section of a 1" pipe, the result will be 33.5 mm, which corresponds to 1" (25.4 mm). When arranging pipeline reinforcing elements, where the parameters are indicated in inches, no difficulties arise. But when installing products made of PP, copper or stainless steel instead of steel structures, it is necessary to take into account the difference in name and parameters.

To create a given flow level, the internal diameter of the pipes is taken into account. For ordinary inch pipes it is 27.1 mm, for reinforced pipes it is 25.5 mm, closest to 1". Pipelines are designated in conventional units of flow area Du (DN). It determines the parameters of the lumen of pipes and is indicated in digital values. The pitch of the conventional flow area sections are selected taking into account the increase in throughput characteristics by 40-60% with increasing index. If the external cross section and the purpose of the structures, using the size table, the internal cross-section is determined.

During connection steel pipes with polymer structures, replacing one with another, conventional adapters are used. Dimensional discrepancies result from the use of copper, aluminum or stainless steel products manufactured to metric standards. The actual metric dimensions of the pipes are taken into account - internal and external.

Steel pipes of the Russian Federation in comparison with the European standard

To compare the range of pipes according to GOST of the Russian Federation and European standards, the following table is used:

How to decide on the diameter?

From diameter water pipes their throughput characteristics depend - the volume of water passed per 1 unit. time. It depends on the speed of water flow. As it increases, the risk of pressure drop in the line increases. Flow characteristics are calculated using formulas, but when planning intra-apartment wiring, they take pipes of certain parameters.

For the plumbing system:

1.5 cm (1/2 inch)
1 cm (3/8 inch).

For the riser, structures with an internal cross section are used:

2.5 cm (1 inch);
2 cm (3/4 inch).

Considering that the internal cross-section of half-inch polymer pipes varies in the range from 11 to 13 mm, and one-inch ones - from 21 to 23, an experienced plumber will be able to determine the exact parameters when replacing. If the type of wiring is complex, there are numerous joints, turns, and the network is laid over a long distance, and the pressure is reduced, it is necessary to provide for the possibility of routing pipes with a large cross-section. As the diameter increases, the pressure level increases.

Below is a table for determining the permeability of steel pipes:

Steel pipe diameter

The cross-section of the pipes corresponds to a number of indicators:

Nominal diameter (DN, Dy) – nominal parameters (in mm) of the internal cross-section of pipes or their rounded values, in inches.
Nominal parameter (Dn Dn,).
External size.
The metric calculation system allows you to classify structures into small - from 5...102 mm, medium - from 102...426, large - 426 mm and more.
Wall thickness.
Inner diameter.

The internal cross-section of pipes with different threads corresponds to the following parameters:

1/2 inch pipeline - 1.27 cm;
3/4 inch – 1.9 cm;
7/8 inches - 2.22 cm;
1 inch – 2.54 cm;
1.5 inches - 3.81 cm;
2 inches - 5.08 cm.

To determine the thread diameter, the following indicators are used:

1/2 inch pipeline – 2.04 - 2.07 cm;
3/4 inches – 2.59 - 2.62 cm;
7/8 inches – 2.99 - 3 cm;
1 inch – 3.27 - 3.3 cm;
1.5 inches - 4.58 - 4.62 cm;
2 inches – 5.79 - 5.83 cm.

Table of correspondence between the diameter of steel pipes and polymer structures:

Steel pipe prices:

PP pipe diameter

PP pipes are produced with a diameter from 0.5 to 40 cm or more. The diameter is internal and external. The first indicator allows you to find out the volume of media passed through in 1 unit. time. The external cross-section is used to carry out construction calculations, namely the selection of a niche or hole for laying a highway. External parameters allow you to choose the right fittings with the corresponding internal indicators.

Small – 0.5; 1; 1.5; 2; 2.5; 3.2; 4; 5; 6.3 and 7.5 cm are used for heating systems, drainage and water supply in private buildings. An internal cross section of 3.2 cm is most popular in multi-story buildings.
Average – 8; 9; 10; eleven; 12.5; 16; 20; 25 and 31.5 cm are used for arranging water supply and sewer systems, allowing you to change cast iron products with similar external parameters. Inner size in 8, 9 and 10 cm ideal for chemical media.
Large - 40 cm or more is used for arranging cold water supply and ventilation systems.

Pipes are marked in inches and mm. When choosing designs for plumbing and heating system, the wall thickness is taken into account, affecting the conditional passability of highways with the same external parameters. With an increase in its parameter, an increase in pressure is allowed in plumbing system. Small dimensions allow you to reduce the cost of purchasing material and water consumption.

Cost of PP pipes:

Video

The description of pipe diameters contains data on all parameters - internal, external, conditional, nominal. Knowledge of the characteristics is required when installing the network and selecting fittings. Otherwise, incorrectly assembled communications threaten loss of tightness and a short service life due to breakdowns. Next, consider the pipe diameters in inches and millimeters.

Dimensional characteristics of pipes

They are reflected in the relevant GOSTs and TUs and contain the following definitions:

Outside diameter– the main characteristic of the pipe.
Inner diameter.
Nominal.
Conditional pass.

More details about the differences:

Outside diameter classified into small, medium and large values - which is why the pipe is used in the appropriate conditions. Small diameter is used in residential and private water supply systems, medium diameter is used in city communications, large diameter is used in industrial ones. Outer diameter – most important characteristic pipes, since the required fitting thread is determined from it. Designation – Dн.
Inner diameter or true. It depends on the thickness of the wall and can differ strikingly from the external one, even if the dimensions of the latter remain unchanged. Designated as Din. It is calculated mathematically (Dн – 2S), where S is the thickness of the pipe wall. Example - the outer diameter of the pipe is 60 mm. Minus the 4 mm walls, its internal diameter will be 52 mm. As the wall thickness increases, the internal parameter decreases.
The nominal bore or diameter of the pipe lumen is marked as Dу. This is the average internal diameter rounded up to standard parameter. For example, the outer diameter of the pipe will be 159 mm. The true internal diameter after subtracting the wall thickness of 5 mm is 149. Then the nominal diameter after rounding is 150 mm. This parameter is considered to select suitable fittings and fittings.
Nominal diameter. The concept was introduced to standardize the marking of pipes made of different materials. The value is equal to the nominal diameter and is marked in inches. This allows you to correctly select pipes from various raw materials for combining in a network - steel and plastic are marked in inches, copper and aluminum - in millimeters.

Thus, the correct selection of components for home communications in accordance with the described concepts is not difficult. Tables for converting sizes from inches to millimeters and vice versa will help in self-repair and replacement of defective sections of networks.

Table of diameter sizes in diameters and millimeters

Nominal diameter (Dy) of the pipe, in mm	The diameter of its thread (G), in inches	Outer diameter (Dh), pipes, mm
Nominal diameter (Dy) of the pipe, in mm	The diameter of its thread (G), in inches	Steel seam pipe, water and gas supply	Seamless steel pipe	Polymer pipe

Complete table of pipe diameters

Diameters, inch	Diameters, mm
1/2	d15
3/4	d20
1'	d25
1’/1/4	d32
1’/1/2	d40
2′	d50
2’/1/2	d65
3′	d89
4'	d100

Inch	Millimeter	Inch	Millimeter
1/64	0,397	33/64	13,097
1/32	0,794	17/32	13,494
3/64	1,191	35/64	13,891
1/16	1,587	9/16	14,287
5/64	1,984	37/64	14,684
3/32	2,381	19/32	15,081
7/64	2,778	39/64	15,478
1/8	3,175	5/8	15,875
9/64	3,572	41/64	16,272
5/32	3,969	21/32	16,669
11/64	4,366	43/64	17,066
3/16	4,762	11/16	17,462
13/64	5,159	45/64	17,859
7/32	5,556	23/32	18,256
15/64	5,953	47/64	18,653
17/64	6,747	49/64	19,447
9/32	7,144	25/32	19,844
19/64	7,541	51/64	20,241
5/16	7,937	13/16	20,637
21/64	8,334	53/64	21,034
11/32	8,731	27/32	21,431
23/64	9,128	55/64	21,828
3/8	9,525	7/8	22,225
25/64	9,922	57/64	22,622
13/32	10,319	29/32	23,019
27/64	10,716	59/64	23,416
7/16	11,112	15/16	23,812
29/64	11,509	61/64	24,209
15/32	11,906	31/32	24,606
31/64	12,303	63/64	25,003

inches	mm.	inches	mm.	inches	mm.	inches	mm.	inches	mm.
-	-	1	25,4	2	50,8	3	76,2	4	101,6
1/8	3,2	1 1/8	28,6	2 1/8	54,0	3 1/8	79,4	4 1/8	104,8
1/4	6,4	1 1/4	31,8	2 1/4	57,2	3 1/4	82,6	4 1/4	108,8
3/8	9,5	1 3/8	34,9	2 3/8	60,3	3 3/8	85,7	4 3/8	111,1
1/2	12,7	1 1/2	38,1	2 1/2	63,5	3 1/2	88,9	4 1/2	114,3
5/8	15,9	1 5/8	41,3	2 5/8	66,7	3 5/8	92,1	4 5/8	117,5
3/4	19,0	1 3/4	44,4	2 3/4	69,8	3 3/4	95,2	4 3/4	120,6
7/8	22,2	1 7/8	47,6	2 7/8	73,0	3 7/8	98,4	4 7/8	123,8

Inch thread parameters

Outer diameter of the connected pipe		SAE Thread Rating	UNF thread rating	Outer thread diameter, mm	Average thread diameter, mm	Thread pitch
mm	inch	SAE Thread Rating	UNF thread rating	Outer thread diameter, mm	Average thread diameter, mm	mm	threads/inch
6	1/4""""	1/4""""	7/16""""-20	11,079	9,738	1,27	20
8	5/16""""	5/16""""	5/8""""-18	15,839	14,348	1,411	18
10	3/8""""	3/8""""	5/8""""-18	15,839	14,348	1,411	18
12	1/2""""	1/2""""	3/4""""-16	19,012	17,33	1,588	16
16	5/8""""	5/8""""	7/8""""-14	22,184	20,262	1,814	14
18	3/4""""	3/4""""	1""""-14	25,357	23,437	1,814	14
18	3/4""""	---	1""""1/16-14	26,947	25,024	1,814	14
20	7/8""""	---	1""""1/8-12	28,529	26,284	2,117	12
22	7/8""""	7/8""""	1""""1/4-12	31,704	29,459	2,117	12
22	7/8""""	---	1""""3/8-12	34,877	32,634	2,117	12
25	1""""	1""""	1""""1/2-12	38,052	35,809	2,117	12

Copper conductors, wires and cables

Conductor cross-section, mm	Copper conductors, wires and cables
	Voltage, 220 V		Voltage, 380 V
	current, A	power, kWt	current, A	power, kWt
1,5	19	4,1	16	10,5
2,5	27	5,9	25	16,5
4	38	8,3	30	19,8
6	46	10,1	40	26,4
10	70	15,4	50	33,0
16	85	18,7	75	49,5
25	115	25,3	90	59,4
35	135	29,7	115	75,9
50	175	38,5	145	95,7
70	215	47,3	180	118,8
95	260	57,2	220	145,2
120	300	66,0	260	171,6

Aluminum conductors, wires and cables

Cross-section of current-carrying conductor, mm	Aluminum conductors, wires and cables
	Voltage, 220 V		Voltage, 380 V
	current, A	power, kWt	current, A	power, kWt
1,5	19	4,1	16	10,5
2,5	27	5,9	25	16,5
4	38	8,3	30	19,8
6	46	10,1	40	26,4
10	70	15,4	50	33,0
16	85	18,7	75	49,5
25	115	25,3	90	59,4
35	135	29,7	115	75,9
50	175	38,5	145	95,7
70	215	47,3	180	118,8
95	260	57,2	220	145,2
120	300	66,0	260	171,6

Inch thread sizes


	Thread diameter in mm			Thread pitch in mm	Number of threads per 1"
	outer d	average d	internal d	Thread pitch in mm	Number of threads per 1"
3/16	4,762	4,085	3,408	1,058	24
1/4	6,350	5,537	4,724	1,270	20
5/16	7,938	7,034	6,131	1,411	18
3/8	9,525	8,509	7,492	1,588	16
1/2	12,700	11,345	9,989	2,117	12
5,8	15,875	14,397	12,918	2,309	11
3/4	19,05	17,424	15,798	2,540	10
7/8	22,225	20,418	18,611	2,822	9
1	25,400	23,367	21,334	3,175	8
1 1/8	28,575	26,252	23,929	3,629	7
1 1/4	31,750	29,427	27,104	3,629	7
1 1/2	38,100	35,39	32,679	4,233	6
1 3/4	44,450	41,198	37,945	5,080	5
2	50,800	47,186	43,572	5,644	4 1/2

Nominal thread diameter in inches
	Thread diameter in mm			Thread pitch in mm	Number of threads per 1"
	outer d	average d	internal d	Thread pitch in mm	Number of threads per 1"
1/8	9,729	9,148	8,567	0,907	28
1/4	13,158	12,302	11,446	1,337	19
3/8	16,663	15,807	14,951	1,337	19
1/2	20,956	19,794	18,632	1,814	14
5/8	22,912	21,750	20,588	1,814	14
3/4	26,442	25,281	24,119	1,814	14
7/8	30,202	29,040	27,878	1,814	14
1	33,250	31,771	30.293	2,309	11
1 1/8	37,898	36,420	34,941	2,309	11
1 1/4	41,912	40,433	38,954	2,309	11
1 3/8	44,325	32,846	41,367	2,309	11
1 1/2	47,805	46,326	44,847	2,309	11
1 3/4	53,748	52,270	50,791	2,309	11
2	59,616	58,137	56,659	2,309	11

Unit conversion table

Conversion of energy units	Conversion of pressure units
1 J = 0.24 cal	1 Pa = 1 N/m*m
1 kJ = 0.28 Wh	1 Pa = 0.102 kgf/m*m
1 W = 1 J/s	1 atm =0.101 mPa =1.013 bar
1 cal = 4.2 J	1 bar = 100 kPa = 0.987 atm
1 kcal/h = 1.163 W	1 PSI = 0.06895 bar = 0.06805 atm

Size conversion tables: simple and fast

The process of selecting the required cross-sectional sizes of threads, cables and pipes often takes a lot of time. In addition to the fact that it is necessary to select the appropriate dimensions, taking into account the parameters of the equipment, the customer has to independently convert the data into suitable units of measurement. This process requires significant time.

We simplify this task because we invite you to use ready-made translation tables. On the page of our website you will find tables that will help you easily select the necessary threads for inch pipes, copper and aluminum wires and cables. Also, you can use the table for converting inch dimensions to metric ones, thereby accurately calculating the required section dimensions.

Unfortunately, most equipment manufacturers leave the customer alone with the calculations. Therefore, a person has to independently search the Internet for translation tables in order to select optimal sizes wire sections and pipe diameters.

We value the time of our clients, providing everyone with the opportunity to use ready-made solutions. Translated in our tables standard sizes from inches to millimeters.

On this page you will also find translations of basic energy units and pressure units, therefore, you will be able to choose the right refrigeration equipment, taking into account the individual placement conditions and operating modes of the units.