Pipes

Pipes are the largest category in the E-Metall catalogue: 821 active SKU. We cover all key tasks: load-bearing steel structures, heating, water supply, gas networks, oil and gas equipment, steel frames.

Fast-movers (seamless Ø 25—108, profile 40×40, 60×60, water-gas ½″—1¼″) are kept on safety stock — same-day shipment. Large diameters and non-standard walls — factory shipment 5—14 days.

Classification & types

Seamless hot-deformed

Produced by rolling a solid billet without a seam. The most reliable — uniform strength across the section. Used in high-pressure systems, boiler piping, critical steel structures, oil and gas. GOST 8732-78. Steels 20, 35, 09G2S.

ERW longitudinal seam

Made from sheet or strip with a longitudinal welded seam. Available in a wider diameter range — up to 1420 mm. Cheaper than seamless. Used in trunk water mains, district heating, steel structures. GOST 10704-91. Steel St3.

Profile (square and rectangular)

Square or rectangular section, usually formed from a round ERW pipe by squeezing. Main applications — building frames, stairs, fences, exhibition equipment, furniture. GOST 30245-2003.

Water-gas (VGP)

Thin-wall steel pipes with tighter dimensional accuracy for threaded joints. Used only in internal low-pressure (up to 1.0 MPa) gas and water networks. Sizes in inches: ½″, ¾″, 1″ etc. GOST 3262-75.

Range & standards

Type	Diameter, mm	Wall, mm	Steel	GOST
Seamless h/d	14—530	2—22	20, 09G2S, 35	8732-78
ERW longitudinal	32—1420	1.5—22	St3, 09G2S	10704-91
VGP (water-gas)	15—150	2—4	St2	3262-75
Profile square	15×15—300×300	1.5—12	St3	30245-2003
Profile rectangular	40×20—300×200	1.5—10	St3	30245-2003

Size range & weight

Weight per running metre of fast-mover seamless pipes — for tonnage estimation:

Ø × wall, mm	Weight 1 m, kg	Application
25 × 3.2	1.72	Internal networks
32 × 3.2	2.27	Internal networks
57 × 3.5	4.62	Heating units
76 × 4	7.10	Heating mains
89 × 5	10.36	Load-bearing structures
108 × 5	12.70	Boiler piping
159 × 6	22.64	Trunk water mains
219 × 8	41.63	District heating, oil & gas
325 × 10	77.68	High-pressure trunks

Selection guide

Boiler piping and high-pressure systems — seamless GOST 8732 only, steel 20 or 09G2S (for cold)
Internal water and heating in apartments/houses — VGP ½″—1¼″ or seamless Ø 25—40
District heating mains — large-diameter ERW longitudinal 219—530 mm
Building frames, stairs, fencing — square or rectangular profile
Fences, temporary structures — thin-wall ERW or older profile (we do not offer used material)

Shipping documents

Factory quality passport stating the steel grade, chemistry, mechanical properties and hydro-test results. EAEU conformity certificate. For state procurement — CT-1 or CT-KZ. The full electronic archive of documents — in the personal account on shop.e-metall.kz.

Storage, acceptance, transport

Store under a canopy or in a covered warehouse, on supports at least 100 mm above the ground
Seamless pipes — 1—2 t bundles, profile — 1—1.5 t, water-gas — 0.5—1 t bundles
Before welding — clean rust, oil and scale from the seam zone (at least 20 mm on each side)
Cutting to size — band, plasma, oxy-fuel, see Metal cutting

FAQ

Q. Can ERW pipe be used in a boiler room?

Not recommended. Local stresses at the welded seam under high pressure can become a failure concentrator. For boiler piping use only seamless GOST 8732.

Q. What is the difference between profile pipe 60×60×3 and 60×60×4?

Wall thickness. 60×60×3 = 5.3 kg/m, takes a smaller bending load. 60×60×4 = 6.9 kg/m, for load-bearing nodes. Selected by SNiP calculation.

Q. Can a seamless pipe be bent for a heat exchanger?

Yes, cold-bent or with heat. Minimum bending radius — 3 diameters. We bend U-shaped heat exchangers in-house from a client drawing.

Q. What does “class 1 dimensional accuracy pipe” mean?

It is a tolerance requirement on diameter and wall thickness. Class 1 — the tightest tolerances, for precision tasks (oil pipelines, high-pressure gas). Class 2 — standard for most construction tasks.